The central exchange/system shall be Alpha Communications® / Ring RM5000 series or approved equivalent. System shall have a maximum capacity of 56 total master and/or remote stations, in multiples of 8 stations. System shall have four (4) conversation paths (links), permitting up to four (4) simultaneous conversations. The RM5000 central exchange (if less than 56 station capacity) can be field upgraded with the addition of subscriber card(s) and required extension rack(s).
The RM5000 system shall require simple 2 twisted pair home-run wiring from the central exchange to each master and/or remote station, and shall feature all-call, group call, hunt, priority, privacy, direct dialing, conference, camp-on busy, hurry-up, call-back, call-forwarding, secretary transfer, battery back-up and manual simplex override at the master station(s).
Optional features include radio paging, public address tie-in, 2 channels of program distribution, and emergency elevator annunciation.
Contractor shall observe all local and national electrical and building codes.
A variety of master and remote stations is available to meet virtually any system need.
||Transformer 24 VAC +/- 10%, 50/60Hz or rectifier 24VDC, (battery for no break) Power
||Approx. 20W plus 1W per 8 station subscriber card
|Maximum Input to Program Distr.:
||Aux. line, 100mV/600 ohm Cable
||1 Pair for system information/audio 1 Pair for DC power supply
||EPROM 256 kbyte RAM 64 kbyte
||+10 to +35 degrees C. (+77 to +95 degrees F.)
||Frequency Range: 300-5000Hz
Galvanic Line: 0 dBm (1mW/600 ohm)
Speech level, idle: -12 dBm
Speech level, max: +4 dBm
Signaling Level: -10 dBm
Signaling Frequencies: CCITT specifications