Toa MS-900 User manual

Features
Security Intercom Systems for critical applications such as corporate, correctional,
educational, government, military, parking structures, police, and others
“Sub-to-Master” and “Master-to-Master” Station Communication
Proven TOA Quality and Reliability
UL-Listed, Manufactured to ISO-9001 Standards
User-Friendly Installation, Setup and Maintenance
Modular Design — Scalable for cost-effective system configurations with easy
system expansion
Station Capacity:
Single Exchange Mainframe: 4 Master stations and 64 Sub-stations
Up to 16 Tie-lined Exchange Mainframes: 64 Master stations and 1,024 Sub-stations
Flexible Programming and Control Software — For setup and maintenance of multiple
exchanges from one PC or remotely via modem
Security System Integration — Communication protocol available for remote control and
monitoring of intercom system functions from external devices
Comprehensive Call Forwarding Features — Busy, No-Answer, C/O Line and Time-Based
to prevent unanswered calls and allow attendant mobility
Recording Outputs — For individual conversation recording of each master station,
telephone master station and telephone line port with start/stop control activation
Event Logging — All system events are date and time-stamped for PC archiving
Master Station Flexibility — Supports TOA MS-900 or standard Caller-ID analog telephones
Console Master Interface — Allows custom master station fabrication with headset,
microphone, speaker, and key ports
Durable Sub-stations — Choose from Economy, Indoor, Outdoor, and Panic models,
each with heavy-duty plate, call-switch and optional LED/relay control
Simple “Star Configuration” Wiring — Each station connects to exchange via shielded,
twisted pair (sub) or two twisted pairs (master)
Extended Cable Runs — Master Stations: 7,546 ft. , Sub-stations: 4,265 ft. and Tie-Lined
Exchanges: 4,921 ft. (#20 AWG)
Site Connector Interface — Allows remote exchange connections with fiber optic or
other media converters
Telephone Interface supports two outside C/O telephone lines or trunks
Paging Interface — For external amplifier zone distribution with sixteen control ports
External Source Input — For station and external amplifier zone distribution with
four trigger inputs
Two Year Warranty
The TOA VS-900 SECURITY INTERCOM SYSTEM
provides reliable and intelligible voice communication
for critical security applications, including corporate
security, correctional institutions, educational facilities,
hospital access points, and parking structures. For
over 35 years,TOA has developed a proven track
record of innovative, reliable intercom products,
including the groundbreaking EXES and IC-100 systems.
The TOA VS-900 system is UL and CUL Listed and
manufactured to ISO-9001 standards to ensure
continuous operation for extended periods.
Ideal for applications with multiple“sub”stations
calling in to one or more“master” stations, the VS-900
has a wide range of standard and software pro-
grammable features, including comprehensive Call-
Forwarding to allow system operators freedom of
movement and most importantly, to ensure that no
calls go unanswered. The VS-900 integrates easily
with access control and video surveillance equip-
ment via a simple RS-232 communications protocol.
Other features include telephone system integration,
paging and external source distribution, event log-
ging, and recording outputs.
The VS-900 scalable architecture allows the most
cost effective configuration for each application
with easy expansion as the size of the facility grows.
Each exchange mainframe supports up to 4 master
stations and 64 sub-stations. For large systems,
exchanges can be expanded or“tie-lined”to provide
up to 64 master stations and 1,024 sub-stations. The
master stations can be either the TOA MS-900 or standard
off-the-shelf single line telephones with support for
Caller-ID signaling. Sub-stations include Economy,
Indoor, Outdoor, and Panic models, each with heavy-
duty plate, call switch and optional LED/relay control.
Direct select interface cards provide relays,LED drivers
and switch inputs for custom consoles and annunci-
ator panels.
The VS-900 Security Intercom System is backed with
a two-year warranty.
VS-900
SECURITY
INTERCOM SYSTEMS
VS-900
TOA Electronics, Inc.
Applications
Access Control
Corporate Security
Correctional Institutions
Educational Facilities
Government
Hospital Access Points
Industrial
Military
Parking Garages
Parking Structures
Police
Restricted Door Access

P2
FEATURES AND FUNCTIONS
Scalable Architecture — The expandable, modular design allows you to
specify the most cost-effective station configuration for each installa-
tion. A single VS-900MF exchange mainframe supports up to 4 master
stations and 64 sub-stations. You can easily connect up to 16
exchanges for a maximum of 64 master stations and 1024 sub-stations.
Master Station Flexibility — Along with TOA MS-900 Master Stations, the
VS-900 also supports standard analog Caller-ID telephones.*
Direct Select Interface — The Direct Select Interface cards provide external
relays, Call-LED drivers and direct select switch inputs for applications
requiring camera control, access control or custom annunciator panels.
The interface can also be used for custom master stations with headset
interface, microphone input, speaker output and key inputs.
System Integration Solution — VS-900 functions can be both remote con-
trolled and monitored with a serial RS-232 data connection. A simple
communications protocol allows integration with access control and
video surveillance equipment such as camera controllers, PLC’s, and
touch-screens.
Flexible Programming and Control Software — System programming and
maintenance is accomplished with flexible Microsoft Windows®-based
software. Features include system configuration, remote dialing, event
logging and communication monitoring. Systems can be set up at the
office and uploaded to the VS-900 at the job-site. In multi-exchange
systems, you can program and maintain up to sixteen exchanges from
a single connection. Programming and event log data can be easily
saved to disk or printed.
Remote System Management — The software accommodates a dial-up
modem connection for off-site programming and maintenance of up
to 16 exchanges.
Telephone System Integration — With the VS-900CO Telephone Interface
card, you can connect up to two outside telephone lines or trunks to
each exchange allowing the following convenient features.
Call Forwarding — Automatically route station calls to offsite locations.
Outside Line Access — Dialing a pre-assigned access number allows
master stations to access an outside telephone line for outgoing calls.
Direct-In Line/Group Call — Routes incoming telephone calls to individual
or multiple master stations simultaneously.
Direct-In Dial — Incoming telephone line callers can dial specific master
or sub-stations directly.
Master Station Features — The TOA MS-900 Master Station includes a 12-
digit alphanumeric LCD, clock, 8 programmable auto-dial keys and the fol-
lowing convenient functions.
Alphanumeric Station Numbering — For easily recognizable dialing and
display, station numbering is fully programmable for both 2 to 6 digit
and 8 alphanumeric characters.
Call-In Display Priority — Sub-stations can be assigned either
Emergency or Normal display priority in the master station queue
during multiple station call-in.
Call Queuing — Up to 64 incoming calls can be queued in order of
pre-assigned priority and answered in any order. Once an existing call
is terminated, the next call moves to the top of the queue.
Selective Response — The master station operator can scroll through a
list of multiple incoming calls and select a specific station call to answer.
Redial — The master station operator can redial the last dialed key
sequence with a single key operation.
Call Hold — The master station operator can place an answered call on hold.
Call Transfer — The master station operator can place an answered call
on hold, dial a third party and then either transfer the original calling
party or return to the original conversation.
Auto-Dial — Each master station operator can assign frequently dialed
station numbers or dialing sequences to eight programmable keys to
allow convenient one-touch operation.
Multiple Communication Modes — Depending on the type of station in
use, users have the choice of Handset, Hands-free and Press-to-talk
(Simplex) Communication.
Call Forwarding — Incoming calls to a master station can be forwarded
internally, manually or automatically, to another master station or
group of master stations or externally, to an outside telephone number
or PBX extension.
Manual Forwarding — Each master station can manually dial a key
sequence to route future sub-station calls to a new destination.
Remote Forwarding (Call Capture) — Sub-station calls to a master station
can be forwarded to a new destination from a remote master station
location.
Time-Based Forwarding (Automatic) — Sub-station calls to a master
station can be automatically forwarded at a pre-programmed time to a
new destination and then automatically reset to normal operation.
Ideal for shift changes or off-hours security.
No Answer Forwarding — Sub-station calls to a master station can be
automatically forwarded to other master stations, outside telephone or
PBX extension after a specific number of unanswered rings.
Busy Forwarding — Sub-station calls to a master station can be auto-
matically forwarded to a master station or outside telephone if the
called master station is busy.
Off-Site Forwarding / Outside Line Call Forwarding — Station calls can
also be routed via Call Forwarding to a preprogrammed outside
telephone number.
Master Station Group Call — Routes incoming sub-station calls to
multiple master stations simultaneously.
Conference / Emergency Conference — Any master station can initiate a
conference with up to two other master stations. A pre-assigned four
station emergency conference can also be initiated with a single key sequence.
Audio Monitoring — Real-time audio monitoring of pre-programmed
sub-station groups with automatic scrolling and stop/forward/back
control.
Event Logging — System events are stored with station numbers, date
and time stamp for PC archiving.
Voice Recording — All master station, telephone master stations and
telephone line ports have individual recording outputs for recording
conversation audio. Each has an associated control port for start/stop
control of an external recording device for the beginning and end of
the conversation.
Paging — Master stations and telephone master stations can initiate
paging to up to 19 sub-station zones, All-Zones and Emergency
All-Stations/Zones. A separate Paging Output is also available for con-
nection to an external paging amplifier along with 16 programmable
control outputs for external relay activation.
Automatic Time-out — A preprogrammed time limit allows automatic ter-
mination of Incoming Station Calls, Conversations and Paging.
External Source Input — Line input for connecting an external music
source or tone generator. Four programmable trigger inputs distribute
the external source to pre-programmed zones.
*See VS-900 Operating Instructions for details on Telephone Master Station features.

MS-900 MASTER STATION
P3
MS-900
Master Station
 Connects to VS-900MS card using
two-twisted pair wiring
 Handset and hands-free speaker/
microphone
 Alpha-numeric, 12 character display
 Digital clock display
 In-use indicator
 Eight programmable auto-dial keys
 Press-to-talk, redial and transfer keys
 Station number directory
 Adjustable speaker volume and
microphone sensitivity
 Speaker High/Low volume selector
switch
 Standard RJ-11 telephone jack
 External speaker terminals for high
ambient noise areas
 Wall-mount bracket included
69.5
74.5
213
216
208
125
21 83.5
80.5
94
60
Rear View
UNIT:mm
Top View Side View Wall mo nting bracket
REGISTER
0
*
PTT
21
PRS
7
GHI
4
TUV
OPER
8
JKL
5
ABC
MIN.
SP. VOL.
HANDSET
MAX.
OFF
8
7
#
CREDIAL XFER
1
3
WXY
9
MNO
6
5
3
DEF 2
6
4
LINE
Do not connect this jack
to telephone line.
ON
Power Source 24 VDC (supplied from the VS-900MS)
Communication Modes Duplex,half-duplex and PTT
Frequency Response 300 – 3,400 Hz
(Speech)
Handset Microphone/ Dynamic type, 150 ohms
Speaker
Handsfree Microphone Electret condenser microphone
Station Speaker Dynamic type, 8 ohms,2.24” (57 mm),0.6 W
Key Pad Membrane switches
Display 12 digit LCD
Auto-Dialing 8 keys (programmable)
Station Speaker Volume 2-step selection slide switch
Control
Handset Speaker Volume Volume, 0 to +12 dB
Control
Installation Method Desk/Wall-mount
Wiring Two twisted pair cables
Connectors Modular jack (RJ-11 type)
External speaker output:screw terminal (8 ohms,0.6 W)
Operating Temperature 32º - 104º F (0º- 40ºC)
Finish ABS resin,pale white
Dimensions (W x H x D) 8.50" x 2.93" x 8.39"
(216 mm x 74.5 mm x 213 mm)
Weight 2.07 lbs.(940 g)
Maximum Service Distance* 24 AWG 2,953 ft./0.56 mile (0.9 km)
22 AWG 4,921 ft./0.93 mile (1.5 km)
20 AWG 7,546 ft./1.43 mile (2.3 km)
*Distance may be limited by job site conditions.

P4
VS-900 SUB-STATIONS
RS-150
RS-160/RS-170
RS-180
 Heavy-duty brushed stainless steel faceplate, #11 GA (RS-150: #14 GA)
 Vandal-resistant call button (except RS-150)
 Weather-resistant models (RS-170 and RS-180)
 Connects to VS-900RS card using shielded, twisted pair wiring*
 Mounts in two-gang deep electrical box with adapter ring
(supplied by others)
RS-180
 Red vandal-resistant call button
 Red Call Assurance LED for ADA-compliance
 Control output – open collector-type for external relay control
 Labeling area for ADA-compliant message
RS-150
Economy Indoor Sub-station
RS-160
Indoor Vandal Sub-station
RS-170
Outdoor Vandal Sub-station
RS-180
Outdoor Panic Sub-station
UNIT:mm
Front View Side View Rear View
Top View
Bottom View
120
Orange (A)
Brown (B)
Black (C)
48.5
43.5
83.5
46
120
2
90
Bottom View
Top View
Rear ViewSide View
Front View
UNIT:mm
120
Weather-resistant coating (RS-170)
Orange (A)
Brown (B)
Black (C)
3
57.5
52.5
90
46
120
83.5
Bottom View
Top View
Rear ViewSide View
Front View
UNIT:mm
120
Weather-resistant coating
Bl e
(Open collector: COM)
(Open collector: Hot)
White
Black (C)
Brown (B)
Orange (A)
3
58.5
52.5
90
83.5
120
46
Input Power 1 W
Impedance 625 ohms (1 W @ 25 V line)
Output SPL (1 W/1 m) 82 dB SPL
Frequency Response 300 to 4k Hz
Internal Speaker 1.57”(4 cm) Mylar cone
Sensitivity as Microphone -40 dB (0 dB = 1 V/Pa)
Faceplate Brushed stainless steel
RS-150:#14 gauge (2 mm)
RS-160/170/180:#11 gauge (3 mm)
Weather-Resistant Coating Synthetic rubber sealant (RS-170/180)
Call Button RS-150:Resin,black
(Momentary-action) RS-160/170:Stainless steel,silver
RS-180:Aluminum,red
Call LED (RS-180) Red LED
Control Output (RS-180) Open-collector type,30 mA, 24 VDC
Ambient Temperature RS-150:+14º– +122ºF (-10º– +50ºC)
RS-160/170/180:+14º– +131ºF (-10º– +55ºC)
Dimensions Faceplate:4.72”x 4.72”(120 mm x 120 mm)
Maximum depth:2.1”(52.5 mm)
Mounting hole spacing:1.81”x 3.28”(46 mm x 83.5 mm)
Weight RS-150:0.90 lbs (410 g)
RS-160/170:1.19 lbs (540 g)
RS-180:1.26 lbs (570 g)
Accessories Nickel-plated steel,slotted,oval head screw No.6 - 32 (4 pcs.)
Maximum Service Distance** 24 AWG 1,640 ft./0.31 miles (0.5 km)
22 AWG 2,625 ft./0.5 miles (0.8 km)
20 AWG 4,265 ft./0.81 miles (1.3 km)
*Note:Fiber optic interfaces available from others.
**Distance may be limited by job site conditions.

VS-900 EXCHANGE MAINFRAME
P5
 Mainframe for system cards
 Supports up to 4 master stations and 64 sub-stations
Requires one PU-200 Power Supply for 32 sub-stations
and 2 PU-200 for 33-64 sub-stations
 24 VDC input for backup power supply
 ON/OFF Switch
 LED’s for Status Indication
Microsoft Windows®-based PC required for system
programming
 All programming stored in non-volatile EEPROM
 2 RS-232 ports (programming / logging)
 Rack-mount brackets included (10 RU)
 Optional wall-mount bracket, model YC-303
Front view witho t front panel
Side View
Top View
Front View
UNIT:mm
POWER
MAIN FRAME VS-900MF
288.3
101.6101.637.8 164.9
466.6
420
483.6
443.7
VS-900MF
Exchange Mainframe
Power Source 20 VAC, 24 VDC
Current Consumption 7 A
Speech Path Configuration Time sharing digital switch
Internal Sound Source 12 types
Serial Ports Complies with the RS-232C Standard,D-sub connector
(9-pin,female),2 ports
Installation Method Rack-mount or wall-mountable with YC-303
Other Real time clock for time control
Unit presence/non-presence detection
System programming
Power switch
Connectors Bus connector:DIN connector (64-pin,female) x 9
(2) PU-200 connection terminal:4-pin x 2
24 VDC input terminal:4-pin (with grounding terminal)
Operating Temperature 32º- 104ºF (0º- 40ºC)
Finish Pre-coated steel plate,black, 30% gloss
Dimensions (W x H x D) 16.54”x 17.47”x 11.35”(420 x 443.7 x 288.3 mm)
Weight 28 lbs.(12.7 kg)
Accessories (included) Rack-mount bracket (2) and screws (8)
Mounting screw (M4 x 10) (6)
Cable clip (20)
4-pin removable terminal block (3)
Lithium battery (CR2032)
Floppy disk (Microsoft Windows®-based software) (2)
Operating/Installation/Software manuals (1 set)
Slot Card Type
1VS-900MS Master Station Line Card (2 ports)
or
VS-900AL Telephone Master Station Line Card (2 ports)
2VS-900MS Master Station Line Card (2 ports)
or
VS-900AL Telephone Master Station Line Card (2 ports)
3VS-900RS Sub-station Line Card (16 ports)
4VS-900RS Sub-station Line Card (16 ports)
5VS-900RS Sub-station Line Card (16 ports)*
6VS-900RS Sub-station Line Card (16 ports)*
7VS-900CO C/O Telephone Line Card (2 ports)
8VS-900AF Audio Function Card (paging/input/conference)
9VS-900TI Tie-Line Interface Card (multi-exchange)
*Add second PU-200 Power Supply for 3 or more VS-900RS.

YC-303
PN-100B
PU-200
P6
VS-900 EXCHANGE MAINFRAME
CLASS 2
Mo nting Hole (1/1) Front View
Top View
Side View
140W
50/60Hz
110/120VAC
120V AC110V AC
VOLTAGE SELECTOR
OUTPUT
POWER TRANSFORMER
TOA Corporation
MADE IN JAPAN
model PU-200 R
LISTED
POWER SUPPLY
9T11
20V AC 2.5A 20V AC 2.5A Class 2
R
INTENDED FOR INSTALLATION IN A PROTECTED ENVIRONMENT.
ENLEVER LE COUVERCLE. CAR AUCUNNE PIECES INTERIEURES NE SONT UTILISABLE POUR LES
THIS APPLIANCE TO RAIN OR MOISTURE.
CAUTION TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER.
NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
ATTENTION REDUIRE LES RISQUES DE SECOUSSE ELECTRIQUE, NE PAS
UTIRISATEURS. DEMANDEZ A VOTRE PERSONNEL QUALIFIE.
AVERTISSEMENT NE PAS INTERCONNECTER LES BORNES DE SORTIE.
INTERCONNECT OUTPUT TERMINATIONS.
WARNING TO REDUCE THE RISK OF FIRE AND ELECTRIC SHOCK, DO NOT
UNIT:mm
4
18
φ10
160
140
120
178
165 145 115
68
65
UNIT:mm
4-7φ10.5
37.7 101.6
466
483
177
10
Front View
Side View
Top View
440
99200
36.2 7866 78 78
290
338
391.4
Mainframe
VS-900MF
58
UNIT:mm
Bottom View
Front View Side View
PU-200
Power Supply for VS-900MF
Connects to the VS-900MF and provides two 20 VAC outputs
One PU-200 supports 1 or 2 VS-900RS, two PU-200
support 3 or 4 VS-900RS
Wall-mount brackets included
Optional rack-mount panel, model PN-100B
Power Requirements 110/120 VAC,50/60 Hz
Output Voltage 20 VAC x 2
Output Current 2.5 A x 2
Finish Color steel plate, ivory
Dimensions (W x H x D) 6.30”x 2.68”x 7.01”(160 x 68 x 178 mm)
Weight 6.17 lbs.(2.8 kg)
Accessories (included) Round head wood screw (3.5 x 25) (4)
Fuse (125 V,4 A) (2)
Fuse (250 V,2 A) (1)
Wall-mount brackets (2)
PN-100B
Rack-Mount Panel for (2) PU-200 (4 RU)
YC-303
Wall-Mount Bracket for VS-900MF
Finish Steel,black,electrode position paint
Dimensions (W x H x D) 15.41”x 17.32”x 2.28”(391.4 x 440 x 58 mm)
Weight 4.63 lbs.(2.1 kg)
Accessories (included) Wood screw (5.1 x 38) (4)
Tapping screw (4 x 12) (4)

VS-900 LINE CARDS
P7
VS-900MS
Master Station Line Card
 Two MS-900 Master Station ports
 Two Recording Line outputs
 Two Recording Control outputs (open collector)
 Removable terminal blocks
VS-900RS
Sub-station Line Card
 Sixteen RS Sub-station ports
 Two talk paths/speech links (one
speech, one speech/paging)
 Paging input and output for external
paging amplifier connection
 Removable terminal blocks
VS-900AL
Telephone Master Station Line Card
 Two standard analog telephone ports*
 Caller-ID Signalling
 Two Recording Line outputs
 Two Recording Control outputs (open collector)
 Removable terminal blocks
Number of Lines 2 lines
Conversation Recording Audio signal:0 dBV,unbalanced
Output Control signal:Open collector output,24 VDC max.
Control current:20 mA
Connectors Mainframe: DIN connector (64-pin,male)
Line output:4-pin x 2
Recording audio/control output:4-pin x 2
VS-900MS
VS-900AL
Number of Lines 2 lines
Conversation Recording Audio signal:0 dBV,unbalanced
Output Control signal:Open collector output,24 VDC max.
Control current:20 mA
Selectable Signal Type DTMF
Monitoring Function Line loop detection function
Applicable Terminal Telephone sets to comply with FCC Part 68
Control Function Call signal transmission,audible signal transmission,
caller identification signal transmission (Caller ID Function)
Connectors Mainframe: DIN connector (64-pin,male)
Line output:2-pin x 2
Recording audio/control output:4-pin x 2
Maximum Service Distance Loop resistance less than 500 ohms (including
telephone)
VS-900RS
Number of Lines 16 Sub-station lines
Number of Links 2 links (1 Speech, 1 Speech/Paging)
Paging Output Unbalanced, -20 dBV,2k Ω
Paging Input Balanced, 25 V line amplifier, 16 W min.
Conversation Method Half-duplex conversation by voice-operated switch
or simplex conversation by PTT switch
Power Output 1 W @ 25 V line per speech link
Other Call button detection function and speech link
control function
Connectors Mainframe: DIN connector (64-pin,male)
Sub-station:Two-core shielded cable (3-pin) x 16
* Telephone equipment supplied by others

P 8
VS-900 INTERFACE CARDS
VS-900CO
C/O Telephone Interface Card
 Two Outside Telephone (C/O) Line ports
 Two Recording Line outputs
 Two Recording Control outputs (open collector)
 Removable terminal blocks
VS-900AF
Audio Function Card
 Paging Line output
 Sixteen Paging Control outputs (open collector)
 External Source Line input
 Four External Source Trigger inputs for zone
distribution
 Link for Conference and Emergency Conference
features
 Removable terminal blocks
VS-900CO
Number of Lines 2 lines
Conversation Recording Audio signal:0 dBV,unbalanced
Output Control signal:Open collector output,24 VDC max.
Control current:20 mA
Selectable Signal Type DTMF
Signal Format Loop start and Ground start compatible
Main Functions DTMF dial signal transmission function,
DTMF signal detection function
Call signal (receiving) detection
Connectors Mainframe: DIN connector (64-pin,male)
C/O line:4-pin x 2
Recording audio/control output:4-pin x 2
VS-900AF
Paging Output Audio output:1 output,0 dBV,unbalanced,1k Ω
Control output:Open collector output,24 VDC max.
Control current:20 mA
External Source Audio input:1 input,0 dBV,unbalanced,22k Ω
Distribution Control input:4 inputs,no-voltage make contact
Open voltage:24 VDC,short circuit current:20 mA
Conference Link 1 link (up to 4-party conference)
Connectors Mainframe: DIN connector (64-pin,male)
External interface side:Voice output 2-pin
Control output 2-pin x 16
Voice input 2-pin
Control input 2-pin x 4

P 9
VS-900 MULTI-EXCHANGE SYSTEMS
VS-900TI
Tie-Line Interface Card
 Required in each VS-900MF exchange
in a multi-exchange tie-lined system
(16 maximum)
 Multi-drop (bussed) configuration
simplifies wiring
 Up to four Voice Links (4x Send/4x
Receive), two twisted pair wiring each*
 One Data Link, RS-485, shielded twisted
pair wiring
 Removable terminal blocks
Number of Audio Links 4 links
Connection Format Multi-drop (bussed)
Transmitting System Data:RS-485
Voice: Base band
Input/Output Level Voice:0 dBu, balanced
Data:In compliance with RS-485 Standard
Other Exchange number setting function
Connectors Mainframe: DIN connector (64-pin,male)
Tie-line interface side:4-pin x 4 (Voice line)
4-pin x 1 (Data line)
Maximum Bus Length 24 AWG 1,969 ft./0.37 mile (0.6 km)
(All Exchanges)* 22 AWG 3,281 ft./0.62 mile (1 km)
20 AWG 4,921 ft./0.93 mile (1.5 km)
*Distance may be limited by job site conditions. To connect exchanges using fiber optic hardware,use
the VS-900SC Site Connector, page 10. Fiber optic interfaces available from others.
POWER
MAIN FRAME VS-900MF
Exchange #16
POWER
MAIN FRAME VS-900MF
Fo r Voice Links (two twisted pair wiring each)
RS-485 Data Link (shielded, twisted pair wiring)
Exchange #2
POWER
MAIN FRAME VS-900MF
Maxim m B s Length (#20 AWG): 0.93 miles (1.5 km)
Exchange #1
Tie-Line Up to Sixteen VS-900MF Exchange Mainframes

P 10
VS-900 SITE CONNECTOR INTERFACE
VS-900SC
Site Connector Tie-Line Interface
 Allows you to connect exchanges using standard
audio fiber interfaces or other media converters
(supplied by others)
Combines up to four voice links from two exchanges
Two exchange systems requiring fiber or other media
connection do not require the VS-900SC
 Requires external power supply, model PU-200
 To determine the number of VS-900SC, subtract “two”
from the total number of VS-900MF Exchange Main-
frames. For example, a system with ten VS-900MF will
require eight VS-900SC.
Site #3
VS-900SC
Fiber I/F
Fiber I/F
B ilding C
B ilding B
Site #2
Notes:
1. All VS-900TI m st be converted to fixed-direction voice links.
2. Fiber Interfaces s pplied by others.
POWER
MAIN FRAME VS-900MF
VS-900MF
w/ VS-900TI
POWER
MAIN FRAME VS-900MF
VS-900MF
w/ VS-900TI
Site #1
B ilding A
POWER
MAIN FRAME VS-900MF
VS-900MF
w/ VS-900TI
Fiber I/F
Fiber I/F
VS-900SC
B ilding D
POWER
MAIN FRAME VS-900MF
VS-900MF
w/ VS-900TI
Fiber Optic Link
Fiber Optic Link
Fo r Voice Links
(two twisted pair wiring each)
RS-485 Data Link
(shielded, twisted pair wiring)
System Example

VS-900 DIRECT SELECT INTERFACE
P11
VS-900DI
Direct Select/Master Station Interface Card
Supports up to (32) VS-910DI Direct
Select I/O cards
Connects between MS-900 Master Station
and VS-900MS port
Use standalone without MS-900 to
provide interface for custom master
stations.
 Headset port
 Microphone input
 Speaker output (1 W, 8 Ohms)
 Key Input terminals (XFER, PTT, C)
 In-use Indication output
 Requires 24 VDC (1 A) power supply,
model XPS-24VS
 Mountable in user-supplied console
or enclosure
VS-910DI
Direct Select I/O Card
Connects to VS-900DI (32 max.)
32 Programmable Relay outputs
(24 VDC, 1 A)
32 Programmable Call-LED drivers
(Open collector type)
32 Programmable Direct Select
Switch inputs
Relays Programmable to
Activate at Call In or Call Answer
Requires 24 VDC (1 A) power supply,
model XPS-24VS
Mountable in user-supplied console
or enclosure
Power Source 24 VDC ±10%/1 A
Maximum Number of 4 per exchange, 64 per system (16 tie-lined exchanges)
Connectable VS-900DI Cards
Function Key Input One each of [C], [PTT],[Xfer],and [Test] keys,dry contact,5VDC/0.5 mA
Contact resistance:<50 ohms,8-pole screwless terminal
Communication Line 1 line for VS-900 exchange (VS-900MS card) and 1 line for MS-900
master station,One 6-position/4-contact modular jack for each line
In-Use Indication Output Open collector output,24 VDC/approx.100 mA,2 pole screwless terminal
Electret Microphone Input Microphone sensitivity:-75 to -65 dBV,5 VDC phantom power supply,
2-pole screwless terminal
Speaker Output Speaker impedance:8 ohms,power output:1 W maximum,2-pole
screwless terminal
Headset Connection Microphone sensitivity: -75 to -65 dBV,speaker impedance:200 to
400 ohms,detection jack contact input [Det.]: 5 VDC/10 mA, contact
resistance:<10 ohms,8-pole screwless terminal
PC Interface RS-232C D-sub connector (9 poles,female type)
Maximum Service Distance* 24 AWG 2,953 ft./0.56 mile (0.9km)
(including MS-900) 22 AWG 4,921 ft./0.93 mile (1.5 km)
20 AWG 7,546 ft./1.43 mile (2.3 km)
*Distance may be limited by job site conditions.
Power Source 24 VDC ±10%/1 A
VS-910DI Ports 32 relay outputs (call- or response-activated relay output),24VDC/1 A,
50-pole“CHAMP”IDC (Amphenol) connector*
32 open collector outputs (for LED indication of incoming and outgoing
calls) 24VDC/approx.100 mA,50-pole“CHAMP”IDC (Amphenol) connector*
32 switch inputs (for calling and response switch operation),dry contact,
5 VDC/0.5 mA,contact resistance:<50 ohms,50-pole“CHAMP”IDC
(Amphenol) connector*
Maximum Number of 32
VS-910DIs per VS-900DI
Maximum Number of Ports 1,024 relay outputs (call- or response-activated relay output)
per Full VS-910DI-Mounted
System 1,024 open collector outputs (for LED indication of incoming and
outgoing calls)
1,024 switch inputs (for calling and response switch operation)
* Mating connectors supplied by others.
VS-900DI
VS-910DI

Master Sub-stations2VS-900MF PU-200 VS-900MS/AL VS-900RS VS-900CO3VS-900AF3VS-900TI
Stations1
464122 4110
8 128 2 4 4 8 2 2 2
12 192 3 6 6 12 3 3 3
16 256 4 8 8 16 4 4 4
20 320 5 10 10 20 5 5 5
24 384 6 12 12 24 6 6 6
28 448 7 14 14 28 7 7 7
32 512 8 16 16 32 8 8 8
36 576 9 18 18 36 9 9 9
40 640 10 20 20 40 10 10 10
44 704 11 22 22 44 11 11 11
48 768 12 24 24 48 12 12 12
52 832 13 26 26 52 13 13 13
56 896 14 28 28 56 14 14 14
60 960 15 30 30 60 15 15 15
64 1024 16 32 32 64 16 16 16
P12
TOA Electronics, Inc.
601 Gateway Boulevard
Suite 300
South San Francisco, CA 94080
Tel: [phone]
Fax: [phone]
www.toaelectronics.com
© 2003 TOA Electronics,Inc.
VS-900 SYSTEM CONFIGURATION
1TOA MS-900 Master Station or analog (DTMF) telephone (supplied by others)
2RS-150,RS-160,RS-170, RS-180
3Optional,see page 8 for details
Literature Order #: L-VS-900
Specifications subject to change without notice.
Windows® is a registered trademark of Microsoft Corporation.
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