TOA Electronics Intercom System VS 900 User Manual

VS-900  
Security Intercom Systems  
Architectural and Engineering  
Specification  
TOA Electronics, Inc.  
601 Gateway Blvd., Ste. 300  
So. San Francisco, CA 94080  
1-650-588-2538 / 1-800-733-4750  
V1, All Rights Reserved, 2002  
 
VS-900 Architects and Engineering Specifications v1.0  
3.4.2  
3.4.3  
VOICE-OPERATED (VOX) SWITCHING (HALF-DUPLEX).................................... 13  
"PRESS-TO-TALK" (PTT) CONTROL ..................................................................... 13  
3.5  
3.6  
3.7  
3.8  
3.9  
CALLING PARTY DISPLAY............................................................................................ 13  
SUB-STATION PRIORITY LEVEL.................................................................................. 13  
SELECTIVE RESPONSE/CALL QUEUE........................................................................ 13  
AUTO-DIAL ..................................................................................................................... 13  
REDIAL............................................................................................................................ 13  
3.10 CAMP-ON-BUSY............................................................................................................. 14  
3.11 GROUP CALL ................................................................................................................. 14  
3.12 CALL TRANSFER ........................................................................................................... 14  
3.13 CALL HOLD..................................................................................................................... 14  
3.14 CALL FORWARDING...................................................................................................... 14  
3.14.1 MANUAL CALL FORWARDING .............................................................................. 14  
3.14.2 REMOTE CALL FORWARDING (CALL CAPTURE)............................................... 14  
3.14.3 TIME-BASED CALL FORWARDING ....................................................................... 14  
3.14.4 OUTSIDE TELEPHONE LINE CALL FORWARDING ............................................. 15  
3.14.5 TIME-BASED OUTSIDE TELEPHONE LINE CALL FORWARDING...................... 15  
3.14.6 NO-ANSWER CALL FORWARDING....................................................................... 15  
3.14.7 BUSY CALL FORWARDING ................................................................................... 15  
3.15 SCAN MONITOR............................................................................................................. 15  
3.16 CONFERENCE ............................................................................................................... 16  
3.17 EMERGENCY CONFERENCE....................................................................................... 16  
3.18 PAGING........................................................................................................................... 16  
3.18.1 ZONE PAGING ........................................................................................................ 16  
3.18.2 ALL-ZONE PAGING................................................................................................. 16  
3.18.3 EMERGENCY PAGING........................................................................................... 16  
3.18.4 BROADCAST PRIORITY......................................................................................... 16  
3.18.5 PAGING TIME-OUT................................................................................................. 16  
3.19 EXTERNAL SOURCE DISTRIBUTION........................................................................... 17  
3.20 TELEPHONE LINE FUNCTIONS.................................................................................... 17  
3.20.1 OUTGOING TELEPHONE CALLS .......................................................................... 17  
3.20.2 INCOMING OUTSIDE TELEPHONE LINE CALLS (DIRECT-IN LINE)................... 17  
3.20.3 INCOMING OUTSIDE TELEPHONE LINE CALLS (DIRECT-IN DIALING) ............ 17  
3.20.4 OUTSIDE TELEPHONE LINE CONNECTION TIME-OUT ..................................... 17  
3.20.5 OUTSIDE TELEPHONE LINE CALL FORWARDING ............................................. 17  
3.20.6 TIME-BASED OUTSIDE TELEPHONE LINE CALL FORWARDING...................... 17  
3.21 CONVERSATION RECORDING..................................................................................... 18  
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VS-900 Architects and Engineering Specifications v1.0  
1 GENERAL  
1.1 MANUFACTURER  
The manufacturer shall have been in the business of manufacturing microprocessor-based  
communication systems for more than ten years, and shall provide a minimum of two years  
limited warranty to the authorized installing dealer.  
1.2 CONTRACTOR  
The contractor shall only submit products for which they are factory authorized to sell, install and  
service. The contractor shall furnish all equipment, accessories and material. This shall be done  
in strict accordance with specifications and applicable drawings as required for a complete and  
working solid state microprocessor-based intercom system. All material and/or equipment  
necessary for proper operation of the system not specified or described herein shall be deemed  
part of the specifications.  
1.3 QUALIFICATIONS  
Any system substitution proposed as an equal to that herein specified shall be proven to be such  
by the contractor. The contractor shall send the name and model numbers of substitute  
equipment and material together with three copies of specifications and dimensional drawings to  
the architect no less than  
days prior to the bid date. The contractor shall obtain the  
architect’s approval in writing, by addendum, prior to bid date.  
1.4 STANDARD PRODUCTS  
The equipment furnished under this specification shall be equal in every way to that  
manufactured by TOA Electronics Inc. Catalog and model numbers are intended to indicate type  
and quality of design and material, as well as exact operating features. All equipment shall be  
designed by the manufacturer to operate as a complete system, and shall be accompanied by the  
manufacturer’s complete installation and operating instructions. Contractor shall provide drawings  
showing all system interconnections and programming documentation.  
1.5 SERVICE FACILITIES  
The contractor shall make available to the purchaser a service department for the manufacturer’s  
equipment. This contractor shall stock the manufacturer’s components and shall provide  
maintenance during normal working hours at no cost to the purchaser for the warranty period of  
____ years. Damage caused by misuse, abuse or accident is exempt from this warranty. On-site  
service provided outside of normal working hours shall be available at the prevailing overtime  
labor rate.  
1.6 AGENCY APPROVALS  
The security intercom system shall be listed under UL-1950 and manufactured to ISO-9001  
standards.  
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VS-900 Architects and Engineering Specifications v1.0  
2 SYSTEM CONFIGURATION AND COMPONENTS  
2.1 SYSTEM DESCRIPTION  
The security intercom system shall be designed for security applications and provide reliable and  
intelligible voice communication between Master Stations, Telephone Master Stations and Sub-  
stations. A Master Station shall be defined as a station that can selectively dial any other Master  
Station or Sub-station in the system. A Telephone Master Station shall be defined as a single line  
telephone with Caller-ID used as a limited-function Master Station to selectively dial any other  
Master Station or Sub-station in the system. A Sub-station shall be defined as a station that calls  
in to a pre-programmed Master Station or group of Master Stations by pressing and releasing a  
call button.  
2.2 SYSTEM STATION CAPACITY  
The security intercom system exchange mainframe shall be modular, expandable for optimum  
station configuration and capable of future expansion by adding additional station line cards  
and/or exchanges as required. Each exchange mainframe shall be capable of supporting a  
maximum configuration of four (4) Master Stations or Telephone Master Stations and sixty-four  
(64) Sub-stations or a minimum configuration of two (2) Master Stations or Telephone Master  
Stations and sixteen (16) Sub-stations. Optional tie-line cards shall allow interconnection of up to  
sixteen exchange mainframes for a maximum system capacity of sixty-four (64) Master Stations  
or Telephone Master Stations and one thousand and twenty-four (1024) Sub-stations.  
2.3 STATION EQUIPMENT  
2.3.1 DESKTOP/WALL-MOUNT MASTER STATION  
The Master Station shall support duplex, half-duplex and Press-To-Talk (PTT) communication  
modes, depending on the conversation partner and hook-switch status. The Master Station shall  
be exclusively powered by the Master Station Line Card port. Specifications shall include a  
handset and hook-switch, hands-free microphone, electret condenser type and station speaker,  
dynamic type, 8 ohms, 2.24” (57 mm), 0.6 W with high/low volume switch. The Master Station  
shall have an in-use lamp, handset speaker volume control (0 to +12 dB) and station number  
directory. The Master Station shall also have external speaker output, 8 ohms, 0.6 W, with screw  
terminal connector. The Master Station keypad shall utilize membrane-type switches and include  
numeric [0-9], [*], [#], [PTT], [Cancel], [Redial], [Transfer] keys and eight user-programmable  
Auto-Dial keys. A 12 digit LCD shall provide alphanumeric station number and priority status,  
function and digital clock indication. The Master Station shall be suitable for desktop use or wall-  
mounting with an included bracket. The operating temperature range shall be 32 to 104 degrees  
F (0 to 40 degrees C). Finish shall be ABS resin, pale white with dimensions (W x H x D) of 8.50”  
x 2.93” x 8.39” (216 x 74.5 x 213 mm) and weight of 2.07 lbs. (940 g).  
Each Master Station shall have an integral 6-position 4-contact RJ11-type modular telephone jack  
and connect to a unique Master Station Line Card port with one twisted two pair cable with  
maximum service distance as follows: #20 AWG: 7546 ft./1.43 mile (2.3 km); #22 AWG: 4921  
ft./0.93 mile (1.5 km); #24 AWG: 2953 ft./0.56 mile (0.9km).  
The Desktop/Wall-Mount Master Station shall be the TOA MS-900.  
2.3.2 TELEPHONE MASTER STATION  
The security intercom system shall provide direct connection capability with standard DTMF-type  
analog telephones with caller-ID conforming to FCC Part #68 as limited function Master Stations  
referred to within this specification as “Telephone Master Stations”. The security intercom system  
shall support Caller-ID signaling and provide alphanumeric station number indication. The  
Telephone Master Station shall support duplex and half-duplex communication modes,  
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VS-900 Architects and Engineering Specifications v1.0  
depending on the conversation partner. Each Telephone Master Station shall connect to a unique  
Telephone Master Station Line Card port with a single twisted pair cable with total loop  
resistance, including telephone, to be no greater than 500 ohms.  
The Telephone Master Station shall be the (insert preferred manufacturer and model here)  
2.3.3 ECONOMY SUB-STATION  
The Economy Sub-station shall include a heavy-duty faceplate, momentary-action call switch,  
loudspeaker and matching transformer. The faceplate shall be brushed stainless steel, #14  
gauge. Pushing and releasing the sub-station’s call button shall initiate call-in to a pre-  
programmed Master Station, Telephone Master Station or Master Station Group. The  
loudspeaker shall have a 1.57" (4 cm) Mylar cone with a frequency response of 300 Hz to 4 kHz.  
The output sound pressure level at a distance of 1 meter with 1 W of input power applied shall be  
82 dB SPL. The matching transformer shall be rated at 1 W at 25 V line with rated primary  
impedance of 625 ohms. The sub-station shall mount to a two-gang electrical box with adapter  
ring using included #6-32 nickel-plated steel, slotted, oval head mounting screws. The faceplate  
dimensions shall be 4.72" x 4.72" (120 mm x 120 mm). The sub-station shall maintain reliable  
operation in the ambient temperature range of +14 to +122 degrees F (-10 to +50 degrees C).  
The sub-station shall weigh 0.90 lb. (410 g)  
Each Sub-station shall connect to a unique Sub-station Line Card port with a single, shielded,  
twisted pair cable with maximum service distance as follows: #20 AWG: 4265 ft./0.81 miles (1.3  
km); #22 AWG: 2625 ft./0.5 miles (0.8 km); #24 AWG: 1,640 ft./0.31 miles (0.5 km). Systems  
requiring more than one shielded, twisted pair cable for each Sub-station shall not be acceptable.  
The security intercom sub-station shall be the TOA model RS-150.  
2.3.4 INDOOR SUB-STATION  
The Indoor Sub-station shall include a heavy-duty faceplate, momentary-action call switch,  
loudspeaker and matching transformer. The faceplate shall be brushed stainless steel, #11  
gauge. The call switch shall be vandal-resistant. Pushing and releasing the sub-station’s call  
button shall initiate call-in to a pre-programmed Master Station, Telephone Master Station or  
Master Station Group. The loudspeaker shall have a 1.57" (4 cm) Mylar cone with a frequency  
response of 300 Hz to 4 kHz. The output sound pressure level at a distance of 1 meter with 1 W  
of input power applied shall be 82 dB SPL. The matching transformer shall be rated at 1 W at 25  
V line with rated primary impedance of 625 ohms. The sub-station shall mount to a two-gang  
electrical box with adapter ring using included #6-32 nickel-plated steel, slotted, oval head  
mounting screws. The faceplate dimensions shall be 4.72" x 4.72" (120 mm x 120 mm). The sub-  
station shall maintain reliable operation in the ambient temperature range of +14 to +131 degrees  
F (-10 to +55 degrees C). The sub-station shall weigh 1.19 lb. (540 g).  
Each Sub-station shall connect to a unique Sub-station Line Card port with a single, shielded,  
twisted pair cable with maximum service distance as follows: #20 AWG: 4265 ft./0.81 miles (1.3  
km); #22 AWG: 2625 ft./0.5 miles (0.8 km); #24 AWG: 1,640 ft./0.31 miles (0.5 km). Systems  
requiring more than one shielded, twisted pair cable for each Sub-station shall not be acceptable.  
The security intercom sub-station shall be the TOA model RS-160.  
2.3.5 OUTDOOR SUB-STATION  
The Outdoor Sub-station shall include a heavy-duty faceplate, momentary-action call switch,  
loudspeaker and matching transformer. The faceplate shall be brushed stainless steel, #11  
gauge. The call switch shall be vandal-resistant. Pushing and releasing the sub-station’s call  
button shall initiate call-in to a pre-programmed Master Station, Telephone Master Station or  
Master Station Group. The loudspeaker shall have a 1.57" (4 cm) Mylar cone with a frequency  
response of 300 Hz to 4 kHz. The output sound pressure level at a distance of 1 meter with 1 W  
of input power applied shall be 82 dB SPL. The matching transformer shall be rated at 1 W at 25  
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VS-900 Architects and Engineering Specifications v1.0  
V line with rated primary impedance of 625 ohms. The sub-station shall be weather-resistant for  
use in outdoor applications. The sub-station shall mount to a two-gang electrical box with adapter  
ring using included #6-32 nickel-plated steel, slotted, oval head mounting screws. The faceplate  
dimensions shall be 4.72" x 4.72" (120 mm x 120 mm). The sub-station shall maintain reliable  
operation in the ambient temperature range of +14 to +131 degrees F (-10 to +55 degrees C).  
The sub-station shall weigh 1.19 lb. (540 g).  
Each Sub-station shall connect to a unique Sub-station Line Card port with a single, shielded,  
twisted pair cable with maximum service distance as follows: #20 AWG: 4265 ft./0.81 miles (1.3  
km); #22 AWG: 2625 ft./0.5 miles (0.8 km); #24 AWG: 1,640 ft./0.31 miles (0.5 km). Systems  
requiring more than one shielded, twisted pair cable for each Sub-station shall not be acceptable.  
The security intercom sub-station shall be the TOA model RS-170.  
2.3.6 PANIC SUB-STATION  
The Panic Sub-station shall include a heavy-duty faceplate, momentary-action call switch,  
loudspeaker and matching transformer. The faceplate shall be brushed stainless steel, #11  
gauge. The call switch shall be vandal-resistant and shall include a red push button. Pushing and  
releasing the sub-station’s call button shall initiate call-in to a pre-programmed Master Station,  
Telephone Master Station or Master Station Group. The loudspeaker shall have a 1.57" (4 cm)  
Mylar cone with a frequency response of 300 Hz to 4 kHz. The output sound pressure level at a  
distance of 1 meter with 1 W of input power applied shall be 82 dB SPL. The matching  
transformer shall be rated at 1 W at 25 V line with rated primary impedance of 625 ohms. The  
sub-station shall include a red call LED that flashes immediately after pushing the call button and  
lights continuously during conversation. A control output, 30 mA, 24 VDC, open-collector type,  
shall activate immediately after pushing call button and remain active until call is cancelled. The  
sub-station shall be weather-resistant for use in outdoor applications. The sub-station shall mount  
to a two-gang electrical box with adapter ring using included #6-32 nickel-plated steel, slotted,  
oval head mounting screws. The faceplate dimensions shall be 4.72" x 4.72" (120 mm x 120  
mm). The sub-station shall maintain reliable operation in the ambient temperature range of +14  
to +131 degrees F (-10 to +55 degrees C). The sub-station shall weigh 1.26 lb. (570 g).  
Each Sub-station shall connect to a unique Sub-station Line Card port with a single, shielded,  
twisted pair cable with maximum service distance as follows: #20 AWG: 4265 ft./0.81 miles (1.3  
km); #22 AWG: 2625 ft./0.5 miles (0.8 km); #24 AWG: 1,640 ft./0.31 miles (0.5 km). Systems  
requiring more than one shielded, twisted pair cable for each Sub-station shall not be acceptable.  
The security intercom sub-station shall be the TOA model RS-180.  
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VS-900 Architects and Engineering Specifications v1.0  
2.4 EXCHANGE COMPONENTS  
2.4.1 EXCHANGE MAINFRAME  
The Exchange Mainframe shall be modular and support up to four (4) Master Stations or  
Telephone Master Stations and sixty-four (64) Sub-stations. Each mainframe shall have the  
capacity to accept two Master Station or Telephone Master Station Line Cards, four Sub-station  
Line Cards, one C/O Telephone Line Interface Card, one Audio Function Card and one Tie-Line  
Interface Card. All system cards shall have removable terminal blocks for solderless wiring  
terminations.  
The Exchange Mainframe shall require up to two external Power Supply Units with a maximum  
current consumption of 7 A. A 24 VDC input shall be available for use with a backup power  
supply to maintain operating capability in the event of AC Mains power failure. The Exchange  
Mainframe shall have a Power ON/OFF switch and LED’s for Power and Status indication.  
System cards shall connect to an integral backplane motherboard with onboard microprocessor,  
real-time clock and an internal power supply board with field-replaceable fuses. The speech path  
configuration shall be a time sharing switch with twelve types of internal sound sources. System  
programming shall be performed exclusively with an external computer and all parameters shall  
be stored in EEPROM. Systems requiring a backup battery for programming data storage shall  
not be acceptable. Two RS-232C ports, D-sub connector, 9-pin, female shall be available for  
separate programming and data logging connections.  
Operating temperature range shall be +32 to +104 degrees F (0 to +40 degrees C). The  
enclosure finish shall be pre-coated steel plate, black, and 30% gloss. Dimensions (W x H x D),  
excluding the rack mounting bracket, shall be 16.54” x 17.47” x 11.35” (420 x 443.7 x 288.3 mm)  
and weight shall be 28 lbs. (12.7 kg). The exchange mainframe shall be rack-mountable and  
occupy (10) EIA 19” rack spaces. An accessory wall-mount bracket shall be available with  
material and finish steel, black, electrode position paint with dimensions (W x H x D) of 15.41” x  
17.32” X 2.28” (391.4 x 440 x 58 mm) and weight of 4.63 lbs. (2.1 kg). System programming  
software, installation/operators manuals shall be included with each mainframe.  
The Exchange Mainframe shall be the TOA VS-900MF.  
The Exchange Wall-Mount Bracket shall be the TOA YC-303.  
2.4.2 POWER SUPPLY UNIT  
The Power Supply Unit shall provide two 20 VAC, 2 A AC outputs to the Exchange Mainframe  
and support a maximum of 2 Sub-station Line Cards. The AC mains power requirements shall be  
110/120 VAC, 50/60 Hz. An optional rack-mount panel shall allow side-by-side rack mounting of  
two Power Supply Units and occupy four (4) EIA 19” rack spaces. The material and finish shall be  
steel plate with ivory color with dimensions (W x H x D) of 6.30” x 2.68” x 7.01” (160 x 68 x 178  
mm) and weight of 6.17 lbs. (2.8 kg).  
The Power Supply Unit shall be the TOA PU-200.  
The Rack Mount Panel shall be the TOA PN-100B.  
2.4.3 MASTER STATION LINE CARD  
The Master Station Line Card shall be powered by the Exchange Mainframe and provide  
connection ports for two Master Stations. Each Master Station port shall have an associated  
recording output, 0 dBV, unbalanced and a control activation port, open collector, 24 VDC  
maximum, 20 mA. Control activation shall occur immediately after communication has been  
established and deactivate immediately after communication has been terminated.  
Each Master Station shall connect to a unique Master Station Line Card port with a single twisted  
two pair cable with the following wire gauges and maximum service distances: #20 AWG: 7546  
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VS-900 Architects and Engineering Specifications v1.0  
ft./1.43 mile (2.3 km); #22 AWG: 4921 ft./0.93 mile (1.5 km); #24 AWG: 2953 ft./0.56 mile  
(0.9km).  
The Master Station Line Card shall be the TOA VS-900MS.  
2.4.4 TELEPHONE MASTER STATION LINE CARD  
The Telephone Master Station Line Card shall be powered by the Exchange Mainframe and  
provide connection ports for two DTMF-based analog telephones designed in compliance with  
FCC Part 68 with support for Caller-ID signaling. Each Telephone Master Station port shall have  
an associated recording output, 0 dBV, unbalanced and a control activation port, open collector,  
24 VDC maximum, 20 mA. Control activation shall occur immediately after communication has  
been established and deactivate immediately after communication has been terminated.  
Each Telephone Master Station shall connect to a unique Telephone Master Station Line Card  
port with a single twisted pair cable with total loop resistance, including telephone, to be no  
greater than 500 ohms.  
The Telephone Master Station Line Card shall be the TOA VS-900AL.  
2.4.5 SUB-STATION LINE CARD  
The Sub-station Line Card shall be powered by the Exchange Mainframe and provide connection  
ports for sixteen Sub-stations. Two links: one voice link and one voice/paging link shall allow two  
simultaneous conversations or one conversation and one paging function. Conversation method  
shall be half-duplex by voice-operated switch controlled by the Master Station or Telephone  
Master Station and simplex conversation by PTT switch controlled by the Master Station. The  
combined maximum power output shall be 6 W at 25 V line. A paging output, unbalanced, -20  
dBV and paging input, balanced, 25 V line, 30 W maximum shall allow connection of an external  
amplifier for sub-station paging.  
Each Sub-station shall connect to a unique Sub-station Line Card port with a single, shielded,  
twisted pair cable with the following wire gauges and maximum service distances: #20 AWG:  
4265 ft./0.81 miles (1.3 km); #22 AWG: 2625 ft./0.5 miles (0.8 km); #24 AWG: 1,640 ft./0.31 miles  
(0.5 km).  
The Sub-station Line Card shall be the TOA VS-900RS.  
2.4.6 C/O TELEPHONE LINE CARD  
The Outside Telephone Line Card shall be powered by the Exchange Mainframe and provide  
connection ports for two outside telephone lines or trunks in compliance with FCC Part 68  
regulations. The C/O Telephone Line Card shall be compatible with both loop and ground start  
systems and use DTMF dialing. Each telephone line port shall have an associated recording  
output, 0 dBV, unbalanced and a control activation port, open collector, 24 VDC maximum, 20  
mA. Control activation shall occur immediately after communication has been established and  
deactivate immediately after communication has been terminated.  
The C/O Telephone Line Card shall be the TOA VS-900CO.  
2.4.7 AUDIO FUNCTION CARD  
The Audio Function Card shall be powered by the Exchange Mainframe and provide the  
following: one paging line output, 0 dBV, unbalanced with sixteen associated open collector  
control outputs, 24 VDC maximum, 20 mA; one line input for external source distribution, 0 dBV,  
unbalanced with four associated trigger inputs, no-voltage make contact, open voltage: 24 VDC,  
short circuit current: 20 mA; and one Conference/Emergency Conference link to allow  
simultaneous communication/conversation between multiple Master Stations and/or Telephone  
Master Stations.  
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VS-900 Architects and Engineering Specifications v1.0  
The Audio Function Card shall be the TOA VS-900AF.  
2.4.8 TIE-LINE INTERFACE CARD  
The Tie-Line Card shall be powered by the Exchange Mainframe and allow interconnection of up  
to sixteen exchanges in a multi-drop or “bussed” configuration. Systems requiring a closed loop  
among multiple exchanges shall not be acceptable. User-dialed key sequences required for inter-  
exchange calling and paging shall be identical to those used for intra-exchange calling and  
paging. The Tie-Line Interface shall provide four voice links, 0 dBu, balanced two, twisted pair  
cable each and data control, RS-485, shielded, twisted pair cable, shared among the tie-lined  
exchanges. The maximum service distance (total bus length) shall be as follows: #20 AWG:  
4,921 ft./0.93 mile (1.5 km); #22 AWG: 3,281 ft./0.62 mile (1 km); #24 AWG: 1,969 ft./0.37 mile  
(0.6 km). It shall be possible to convert the voice paths to fixed-direction (send and receive) to  
accommodate standard audio media converters and the Site Connector Tie-Line Interface.  
The Tie Line Interface Card shall be the TOA VS-900TI.  
2.4.9 SITE CONNECTOR TIE-LINE INTERFACE  
The Site Connector Tie-Line Interface shall allow the interconnection of multiple exchanges with  
standard audio fiber interfaces or other media converters by combining up to four voice links from  
two Exchange Mainframe Tie-Line Interface Cards. The Site Connector Tie-Line Interface shall  
require an external 20 VAC Power Supply Unit (see section 2.4.2) and occupy (2) EIA 19” rack  
spaces.  
The Site Connector Tie-line Interface shall be the TOA VS-900SC.  
2.5 PERIPHERAL COMPONENTS  
2.5.1 DIRECT SELECT INTERFACE  
The Direct Select Interface (DSI) Card shall connect between each Master Station and  
associated Master Station Line Card port and support up to thirty-two (32) Direct Select I/O  
(DSIO) Cards. The maximum number of DSI Cards shall be four (4) per exchange and (64) per  
system (16 tie-lined exchanges). The DSI Card shall require an external 24 VDC/1 A power  
supply.  
The DSI Card shall provide headset, microphone input, speaker output and key inputs. A Master  
Station shall not be required to utilize the DSI Card’s headset, microphone input, speaker output  
and key inputs.  
The headset interface shall have adjustable microphone sensitivity from -75 to -65 dBV,  
defeatable 5 VDC phantom power and support speaker impedance of 200 to 400 ohms with  
adjustable speaker volume. A detection jack contact input, 5 VDC/10 mA, contact resistance less  
than 10 ohms shall be available to support headset activation.  
The microphone input shall have adjustable microphone sensitivity from -75 to -65 dBV with a  
defeatable 5 VDC phantom power supply. The speaker output shall provide one Watt power  
output into an eight ohm speaker load with adjustable speaker volume.  
The function key inputs shall allow contact closure activation of the equivalent to the Master  
Station [C], [PTT], and [Transfer] key functions as well as a [Test] key input for activating and  
testing all of the connected DSIO Card outputs. The key inputs shall be activated with a dry  
contact switch closure with a rating of 5 VDC/0.5 mA and contact resistance of less than 50  
ohms. An In-use Indication Output shall be available general purpose control, open collector type,  
24 VDC/100 mA.  
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VS-900 Architects and Engineering Specifications v1.0  
The Direct Select Interface Card shall include an RS-232C D-sub connector, 9-pin, female for  
programming the connected Direct Select I/O Card(s). The DSI shall include an integral 6-position  
4-contact RJ11-type modular plug and connect to the Master Station port with twisted pair cable.  
When using the Master Station, the maximum cable distance shall be the total connected  
distance from the exchange to the Master Station via the VS-900DI and shall be #20 AWG: 7546  
ft./1.43 mile (2.3 km); #22 AWG: 4921 ft./0.93 mile (1.5 km); #24 AWG: 2953 ft./0.56 mile  
(0.9km).  
The Direct Select Interface Card shall be the TOA VS-900DI.  
2.5.2 DIRECT SELECT I/O (INPUT/OUTPUT) CARD  
The Direct Select I/O (DSIO) Card shall connect to the Direct Select Interface Card and provide  
32 sets of I/O connections. Each I/O set shall include a relay, call LED driver and direct select  
input. System programming shall allow the user to associate each I/O set with a Master Station or  
Sub-station. The Direct Select Interface Card shall support a maximum of thirty-two (32) DSIO  
Cards. Each relay shall be normally-open type with contact capacity of 24 V DC/1 A. System  
programming shall allow global configuration of the relay activation mode as call-in or answer-  
activated. Each Call LED output (for LED indication of incoming and outgoing calls) shall be open  
collector-type, 24 V DC/100 mA. A current limiting resistor shall be required in series with each  
LED. Each Direct Select Input contact (for calling and response switch operation) shall be  
activated with a dry contact switch closure with a rating of 5 VDC/0.5 mA and contact resistance  
of less than 50 ohms. The DSIO Card shall require an external 24 VDC/1 A power supply. Each  
type of I/O shall require a 50-position "CHAMP" IDC type (Amphenol type) connector.  
The Direct Select I/O Card shall be the TOA VS-910DI.  
2.5.3 DIRECT SELECT POWER SUPPLY  
The Direct Select Power Supply shall provide 24 VDC with rated 3 A current capacity to support  
one Direct Select Interface Card and two Direct Select I/O Cards.  
The Direct Select Power Supply shall be the TOA XPS-24VS.  
2.6 REMOTE CONTROL AND MONITORING  
The security intercom system shall allow external remote control and monitoring of intercom  
system functions through the exchange mainframe serial port. The intercom manufacturer shall  
provide a serial communication protocol document. The installing contractor shall be solely  
responsible for the correct operation and performance of the security intercom system and all  
external equipment connected to the intercom system.  
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VS-900 Architects and Engineering Specifications v1.0  
3 SYSTEM FUNCTIONS  
Note: “Master Station” refers to proprietary system master station. “Telephone Master Station”  
refers to a single line telephone used as a limited-function Master Station. “Telephone Line” refers  
to outside telephone line communication.  
3.1 STATION COMMUNICATION  
3.1.1 SUB-STATION TO MASTER STATION (OR TELEPHONE MASTER STATION)  
Sub-station call-in to a pre-assigned Master Station (or group of Master Stations) shall be  
activated by pushing and releasing the Sub-station call button. A brief call tone shall sound at the  
Sub-station to alert the caller when the call has been answered. Communication shall be hands-  
free at the Sub-station location. Sub-stations equipped with a call lamp shall flash the call lamp on  
and off immediately after call initiation. When the call is answered, the call lamp mode shall  
change from flashing to steady-on state. After the call is terminated, the call lamp shall revert  
back to the off state.  
3.1.2 MASTER STATION (OR TELEPHONE MASTER STATION) TO SUB-STATION  
Calling a Sub-station from a Master Station shall be accomplished by dialing the desired Sub-  
station number either with the handset on-hook or off-hook. Calling a Sub-station from a Master  
Station shall activate a brief tone at the Sub-station after which the calling party's voice may be  
heard and communication may commence. Sub-stations equipped with a call lamp shall light to  
steady-on state. Following a brief call tone, the Master Station shall be automatically connected to  
the Sub-station. The Master Station's voice shall be heard at the Sub-station while the Master  
Station operator is talking, and the Sub-station's voice shall only be heard at the Master Station  
when the Master Station operator stops talking. To terminate the conversation, the Master Station  
shall replace the handset or press the [C] key, which will also change the Sub-station call lamp to  
the off-state.  
3.1.3 MASTER STATION TO MASTER STATION (OR TELEPHONE MASTER STATION)  
Calling a Master Station or Telephone Master Station from a Master Station or Telephone Master  
Station shall be accomplished by dialing the desired station number either with the handset on-  
hook or off-hook. A trill call tone shall be heard at the calling station handset or from the station's  
internal speaker if dialed with the handset on-hook. A trill call tone shall be heard at the called  
station. Lifting the handset shall stop the call tone and allow conversation to proceed.  
Alternatively, the call may be answered by pressing the [PTT] key for hands-free conversation.  
Either party may terminate the conversation by replacing the handset or pressing the Master  
Station’s [C] key.  
3.2 CALL-IN TIME-OUT  
The programmable Call-in Time-out function shall automatically terminate a call-in from “Normal”  
priority Sub-stations after a specific time if the call is not answered. The time-out period shall be  
programmable in one minute increments from one to ninety-nine minutes.  
3.3 CONVERSATION TIME-OUT  
The programmable Conversation Time-Out function shall automatically terminate intercom  
conversations after a pre-programmed duration, programmable in ten second increments from  
ten to nine hundred and ninety seconds. When the limited time is reached, a warning signal tone  
shall be transmitted to both the calling and called parties to terminate the conversation. The  
Conversation Time-Out shall not apply to “Emergency Conference”, “Outside-Line Telephone  
Conversation” or “Emergency Priority Sub-Station Calls”.  
3.4 CONVERSATION MODES  
Three different conversation modes shall be employed, depending on the type of stations in use.  
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VS-900 Architects and Engineering Specifications v1.0  
3.4.1 FULL-DUPLEX  
Communication between two Master Stations shall be full duplex if at least one handset is off-  
hook. Communication between two Telephone Master Stations shall be full-duplex.  
Communication between a Master Station and a Telephone Master Station shall be full duplex if  
the Master Station handset is off-hook.  
3.4.2 VOICE-OPERATED (VOX) SWITCHING (HALF-DUPLEX)  
Communication between a Master Station and a Telephone Master Station shall be VOX if the  
Master Station handset is on-hook. Communication between a Master Station and a Sub-station  
shall be VOX if the Master Station handset is off-hook. The voice level at the Master Station shall  
control the voice switching. Communication between a Telephone Master Station and a Sub-  
station shall be VOX.  
3.4.3 "PRESS-TO-TALK" (PTT) CONTROL  
The Master Station PTT key shall be pressed to talk, and released to listen. Communication  
between two Master Stations shall be PTT if both handsets are on-hook. Communication  
between a Master Station and a Sub-station shall be PTT if the Master Station handset is off-  
hook and PTT if the Master Station handset is on-hook.  
3.5 CALLING PARTY DISPLAY  
The Master Station shall display the 6-digit number or 8-character name of one of up to 64 calling  
stations. When the Master Station simultaneously receives calls from two or more stations, the  
station with the highest priority shall be displayed, and other waiting stations shall be displayed in  
order of priority as the [REDIAL] key is pressed. The display priority shall be displayed in the  
following order: Emergency Conference calls, Emergency priority Sub-station calls, Incoming  
Outside Telephone Line calls, “Normal” priority Sub-station calls and Master Station or Telephone  
Master Station calls.  
3.6 SUB-STATION PRIORITY LEVEL  
Each sub-station shall be assigned a display priority as “Normal” or "Emergency” by system  
programming at the time of installation. “Emergency” sub-station calls shall appear higher in the  
programmed Master Station’s Call Queue.  
3.7 SELECTIVE RESPONSE/CALL QUEUE  
The Selective Response/Call Queue function shall allow a Master Station receiving multiple calls  
simultaneously to select and answer any desired calling party from up to 64 queued calls.  
Pressing the [REDIAL] key shall advance the display to the station number or name of the second  
calling party. Subsequent depressions of the [REDIAL] key will cycle the display through all  
waiting station numbers or names. Lifting the handset when the desired station number (name) is  
displayed shall terminate the calling tone and initiate conversation. Alternatively, the [PTT] key  
may also be pressed for hands-free response.  
3.8 AUTO-DIAL  
Each Master Station shall support an Auto-Dial function and include eight programmable Auto-  
Dial keys to allow one-touch dialing of an assigned station number or to activate functions such  
as Paging, Call Forwarding or other function. Programming the Auto-Dial keys shall be possible  
at the Master Station by the user.  
3.9 REDIAL  
The Redial function shall allow the Master Station operator to one-touch dial the last dialed  
station number or system function. The Redial function shall not be available for Emergency  
Paging.  
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VS-900 Architects and Engineering Specifications v1.0  
3.10 CAMP-ON-BUSY  
The Camp-On Busy function shall allow a caller to wait for a called station to become available if  
a busy tone is heard after dialing.  
3.11 GROUP CALL  
The Group Call function shall allow sub-stations to simultaneously call a pre-programmed group  
of up to 16 Master Stations or Telephone Master Stations. Initiating a call from the Sub-station  
shall simultaneously sound a call tone at all Master Stations or Telephone Master Stations in the  
designated group. The first Master Station or Telephone Master Station in the group to respond  
shall be connected to the Sub-station, canceling the call to the other stations.  
Each group shall include one designated “Representative” station, and up to fifteen designated  
“Member” stations. Each Sub-station shall be programmed to call the “Representative” station. It  
shall be possible for Master Stations and Telephone Master Stations to be “Members” of more  
than one group at a time. “Representative” stations in manual Call Forwarding mode shall  
automatically route calls to the designated receiving station without calling other “Member”  
stations. If the receiving station is also assigned to a group, the call shall be made to all stations  
in that same group. “Representative” or “Member” stations in Busy Call Forwarding or No-Answer  
Call Forwarding mode shall process the call as a normal Group Call. Calls between Master  
Stations and/or Telephone Master Stations shall not call other stations within the group.  
3.12 CALL TRANSFER  
The Call Transfer function shall allow a Master Station (or Telephone Master Station) to transfer  
the conversation partner to another Master Station (or Telephone Master Station).  
3.13 CALL HOLD  
The Call Hold function shall allow a Master Station or Telephone Master Station to place a  
conversation on hold and transmit a holding tone to the conversation partner.  
3.14 CALL FORWARDING  
3.14.1 MANUAL CALL FORWARDING  
The Call Forwarding function shall allow incoming calls to be automatically forwarded to another  
receiving Master Station or Telephone Master Station by registering the receiving station number  
at the original station (forwarding station) or at the destination receiving station (see Remote Call  
Forwarding). Call Forwarding shall be enabled and cancelled at the original station by a simple  
key sequence. After enabled, the registered receiving station number shall be displayed. If the  
designated receiving station is also registered for a Call Forwarding-related function, calls shall  
not be forwarded from that receiving station.  
3.14.2 REMOTE CALL FORWARDING (CALL CAPTURE)  
The Remote Call Forwarding (Call Capture) function shall allow incoming calls to be remotely  
forwarded from the destination receiving station. After registration, the receiving station number  
shall be displayed on the original station. The designated receiving station shall be able to directly  
call the original station. If the designated receiving station is also registered for a Call Forwarding-  
related function, calls shall not be forwarded from that receiving station.  
3.14.3 TIME-BASED CALL FORWARDING  
The Time-Based Call Forwarding function shall allow incoming calls to be automatically  
forwarded to another receiving Master Station or Telephone Master Station during a pre-  
programmed daily time period. During the transfer interval, the registered receiving station  
number shall be displayed on the original station's display panel to indicate that the original  
station is in Time-Based Call Forwarding mode. The designated receiving station can directly call  
the original station without interference from the call forwarding function. If the designated  
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VS-900 Architects and Engineering Specifications v1.0  
receiving station is also registered for a Call Forwarding-related function, calls shall not be  
forwarded from that receiving station.  
3.14.4 OUTSIDE TELEPHONE LINE CALL FORWARDING  
The Outside Telephone Line Call Forwarding function shall automatically route all incoming calls  
to a pre-programmed outside telephone line telephone number for each individual Master Station  
or Telephone Master Station. All outside telephone line telephones calls shall directly call the  
original station without interference from the call forwarding function.  
3.14.5 TIME-BASED OUTSIDE TELEPHONE LINE CALL FORWARDING  
The Time-Based Outside Telephone Line Call Forwarding function shall automatically route all  
incoming calls to an outside telephone line telephone number for each individual Master Station  
or Telephone Master Station during a pre-programmed interval within a twenty four hour time  
period. The forwarding interval (start and end times) shall be registered in system programming.  
All outside telephone line telephones can directly call the original station without interference from  
the call forwarding function.  
3.14.6 NO-ANSWER CALL FORWARDING  
The No-Answer Call Forwarding function shall automatically reroute calls to a Master Station or  
Telephone Master Station to a designated receiving station if the called party does not respond  
within a preset period of time, programmable from one to ninety-nine seconds in one second  
intervals. When several calls are simultaneously made to the original station, the original station  
shall begin its time count upon receiving the first call and then forward all waiting stations when  
the set interval time elapses. The designated receiving station can directly call the original station  
without interference from the No-Answer Call Forwarding function. When the designated  
receiving station is also registered for No-Answer Call Forwarding, the call shall be further  
rerouted to the second station. When the designated receiving station is busy, the original station  
continues to be called. The No-Answer Call Forwarding function shall be disabled when the  
designated receiving station has already been registered for Call Forwarding. The No-Answer  
Call Forwarding function does not interfere with a Sub-station call to a designated Group. Call  
representative station that is registered for No-Answer Call Forwarding. (The group call  
designation shall be given priority.)  
3.14.7 BUSY CALL FORWARDING  
The Busy Call Forwarding function shall automatically route calls to a busy Master Station or  
Telephone Master Station to a designated Master Station or Telephone Master Station. The Busy  
Call Forwarding function shall not interfere with a Sub-station call to a Group Call representative  
station that is registered for Busy Call Forwarding.  
3.15 SCAN MONITOR  
The Scan Monitor function shall allow any Master Station to automatically scan a designated  
group of up to sixteen Sub-stations for listen-only audio monitoring of each Sub-station. System  
programming shall allow a monitor interval time of one to ninety-nine seconds in one second  
intervals with a different interval time for each Master Station. The number or name of the Sub-  
station being monitored shall be displayed on the Master Station. The Scan Monitor function shall  
be available via hands-free or Master Station handset. It shall be possible to pause and restart  
the Scan Monitor function at any station within the group and advance or reverse monitoring by  
one Sub-station intervals. No audio shall be transmitted from the Master Station to the Sub-  
stations being monitored unless the Master Station's [PTT] key is pressed. When the Sub-station  
to be monitored is busy, the busy indication shall be displayed together with a busy tone at the  
Master Station. Incoming calls to the Master Station in the process of scanning Sub-stations shall  
be indicated on the calling party display.  
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VS-900 Architects and Engineering Specifications v1.0  
3.16 CONFERENCE  
The Conference function shall allow any Master Station or Telephone Master Station to initiate  
simultaneous conversation with up to two other Master Stations or Telephone Master Stations.  
3.17 EMERGENCY CONFERENCE  
The Emergency Conference function shall allow any Master Station or Telephone Master Station  
to initiate simultaneous conversation with a pre-programmed group of up to three other Master  
Stations or Telephone Master Station with a short key sequence.  
3.18 PAGING  
The Paging function shall allow Master Stations or Telephone Master Stations to broadcast to  
pre-programmed zones or all-zones of multiple Sub-stations* and/or external public address  
equipment. It shall be possible to initiate the Paging function with the Master Station handset  
either off-hook or on-hook.  
*External amplifier required.  
3.18.1 ZONE PAGING  
The Zone Paging function shall allow paging to up to nineteen (19) individual zones established in  
system programming by combining Sub-stations with external public address system equipment.  
Up to 1,024 Sub-stations and up to 16 external control outputs can be registered per zone. It shall  
be possible to randomly select two or more individual zones simultaneously (up to 19). A paging  
pre-announcement tone shall be transmitted to the selected zones.  
3.18.2 ALL-ZONE PAGING  
The All-Zone Paging function shall allow simultaneous broadcast to all programmed zones of  
Sub-stations and external public address equipment. Sub-stations and external public address  
equipment not assigned to zones shall not receive the All-Zone broadcast. A paging pre-  
announcement tone shall be transmitted to all zones. The Master Station shall initiate the Paging  
function with the handset either off-hook or on-hook and terminate the Paging function by  
replacing the handset or pressing the [C] key.  
3.18.3 EMERGENCY PAGING  
The Emergency Paging function shall allow simultaneous broadcast to all connected Master  
Stations, Sub-stations, and external public address equipment. It shall be possible to restrict  
access to the Emergency Paging function in system programming. A distinct “Emergency” paging  
pre-announcement tone shall be transmitted to all Sub-stations, Master Stations, Telephone  
Master Stations, and external public address equipment. A continuous ringing tone shall sound at  
each Telephone Master Station.  
3.18.4 BROADCAST PRIORITY  
The broadcast priority from highest to lowest shall be Emergency Paging, Emergency  
Conference, External Source Distribution and All-Zone Paging. A higher priority broadcast shall  
interrupt all lower priority paging or broadcast functions.  
3.18.5 PAGING TIME-OUT  
The Paging Time-Out function shall automatically terminate Zone and All-Call paging calls that  
exceed a pre-programmed time limit from ten (10) to nine-hundred and ninety (990) seconds in  
ten (10) second intervals. The Paging Time-Out function shall not affect the Emergency Paging  
function.  
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VS-900 Architects and Engineering Specifications v1.0  
3.19 EXTERNAL SOURCE DISTRIBUTION  
The External Source Distribution function shall allow distribution of an external audio source to up  
to nineteen (19) zones. The function shall be activated by providing a continuous make contact  
closure to one of four trigger inputs. Up to 19 paging zones can be assigned to each one of a total  
of four trigger inputs in system programming. Each zone shall include up to 1,024 Sub-stations  
and up to 16 selective external public address equipment outputs. During the activation input, the  
external source shall be distributed to the pre-programmed zones. The function shall be  
terminated when the activation input is broken. During operation, any other input will not accept a  
make contact closure. Sub-stations designated as "Emergency" priority shall not be accessed by  
the External Source Distribution function.  
3.20 TELEPHONE LINE FUNCTIONS  
The security intercom system shall accept up to two outside telephone lines per exchange,  
allowing the system's Master Stations and Telephone Master Stations to place or receive outside  
telephone line telephone calls.  
3.20.1 OUTGOING TELEPHONE CALLS  
Outside telephone lines shall be accessible by dialing a pre-programmed single-digit access  
number to produce an audible dial tone. The telephone number may then be dialed and after the  
called party answers, conversation may commence. Replacing the handset or pressing the [C]  
key shall terminate the conversation.  
3.20.2 INCOMING OUTSIDE TELEPHONE LINE CALLS (DIRECT-IN LINE)  
The Direct In-Line function shall allow an incoming outside telephone call to sound a call tone at a  
pre-programmed representative and up to 3 member Master Stations and/or Telephone Master  
Stations within the same exchange that is connected to the outside telephone line. Lifting the  
handset or pressing the [PTT] key (Master Station only) shall terminate the calling tones at all  
masters in the group, allowing conversation to begin.  
3.20.3 INCOMING OUTSIDE TELEPHONE LINE CALLS (DIRECT-IN DIALING)  
The Direct In-Dialing function shall allow outside telephone line calling parties to direct-dial a  
station number and be connected to a desired Master Station, Telephone Master Station or Sub-  
station. When a call is received from the outside telephone line, the security intercom system  
shall automatically respond by transmitting a dial tone to the calling party. After hearing the dial  
tone, dialing the station number shall connect the calling station to the called party. If the calling  
party does not dial a station number within 10 seconds after the dial tone is transmitted, the  
registered Direct-In Line stations shall be called. If the called station does not answer for 30  
seconds or more after the calling party dials the station number, the call shall be canceled. Calls  
shall be automatically forwarded if the station called from the outside telephone line is currently in  
Call Forwarding, Busy Call Forwarding or No-Answer Call Forwarding mode. Calls shall not be  
automatically forwarded when the station called from the outside telephone line is currently in  
Outside telephone line Call Forwarding mode.  
3.20.4 OUTSIDE TELEPHONE LINE CONNECTION TIME-OUT  
The Outside Telephone Line Connection Time-Out function shall limit the duration of connection  
with the outside telephone line to a duration of one (1) to ninety-nine (99) minutes in one (1)  
minute intervals. When the limited time is reached, a warning signal tone shall be transmitted to  
both the calling and called parties.  
3.20.5 OUTSIDE TELEPHONE LINE CALL FORWARDING  
See section 3.12.4.  
3.20.6 TIME-BASED OUTSIDE TELEPHONE LINE CALL FORWARDING  
See section 3.12.5.  
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VS-900 Architects and Engineering Specifications v1.0  
3.21 CONVERSATION RECORDING  
The Conversation Recording function shall allow individual recording of each Master Station,  
Telephone Master Station and Telephone Line port. Each port shall have an associated recording  
output, 0 dBV, unbalanced and a control activation port, open collector, 24 VDC maximum, 20  
mA. Control activation shall occur immediately after communication has been established and  
deactivate immediately after communication has been terminated.  
18  
 

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