Project Name M-DCPS MASTER Nov. 2014
Project No. SPECIFICATION GUIDELINES 13745 − 5
B. The central control shall be of the modular plug-in printed circuit board type, using solid-
state microprocessor and memory, solid-state sensing and logic. It shall also provide 2-
wire balanced transmission with dial-tone, ringing, and busy signal capabilities, if
applicable.
C. The user programmable functions shall be contained in non-volatile memory.
D. The system clock automatically restores the proper time of day on all Administrative
Control Stations upon restoration of power following an AC power failure.
E. The system shall provide at least the following features and functions:
1. Administrative Telephones: Shall be standard Dual-Tone Multi-Frequency (DTMF to
AT&T standards) dialing telephones, identical to those supplied by public telephone
companies, and each shall have a built-in or a desk-top display. Systems using
membrane-type administrative telephones are not allowed.
2. The system shall include a (flush or surface) wall-mounted emergency visual display
located directly above the administrative telephone located in the Administration
secretarial area.
3. All digital readout displays (in telephones or on the wall), shall perform the following:
a. Display all incoming calls by their designated room number, and in the order
received.
b. Display shall show the room number for the entire length of the call.
c. Show visually in the order received, 3 calls at one time, and also "store"
additional calls.
d. Immediately display the calling station room number of all priority (emergency)
calls in an identifiable manner.
4. Capability for expanding the system to accommodate 200 call-in or speaker locations
for elementary schools and 500 call-in or speaker locations for middle and high
schools. Systems not accommodating these quantities of speakers/call-in switches
are not allowed.
5. Direct-dialing, 2-way intercom between locations equipped with administrative
telephone and staff/ classroom station speakers, without the use of a press-to-talk or
talk-listen switch.
6. Minimum of two separate intercom channels to allow simultaneous communication
between any two administrative telephones and any two locations.
7. Provisions for user-programmable "executive override", allowing assigned
administrative telephones (to be programmed by a designated administrative
telephone), to "break-in" on ongoing conversations in the system.
8. Facilities for the instantaneous distribution of emergency announcements
simultaneously to locations equipped with speakers, by dialing a predetermined code
number.
9. Provisions for restricting emergency announcements and alarm signal origination to
certain assigned administrative telephones. This assignment shall be user
programmed by a designated administrative telephone.
10. Provisions for zone-page and all-page restriction. This assignment shall be user-
programmed by a designated administrative telephone.
11. Capability for assigning speaker locations within any one or more of 8 zones for zone
paging or time signal reception. This assignment will be user-programmed by a
designated administrative telephone. Systems without this feature are not allowed.
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