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 Substations. 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 wallmounting 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 preprogrammed 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 substation 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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