Rev. 1 - 12/98
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CB901 Central Exchange (typical)
ARCHITECTS' AND ENGINEERS'
The central exchange/system shall be Alpha Communi-
cations®/Ring CB901 series or approved equivalent.
System shall have a maximum capacity of 7200 total
master and/or remote stations, in multiples of 8 stations.
System shall have a minimum of (15) conversation paths
(links), permitting up to (15) simultaneous conversa-
tions. The CB901 central exchange can be field upgraded
with the addition of subscriber card(s) and required
extension rack(s). Additional talk paths (links) are also
available as an optional upgrade.
The CB901 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 dialling, confer-
ence, camp-on busy, hurry-up, call-back, call-forward-
ing, secretary transfer, battery back-up and manual sim-
plex override at the master station(s).
Optional features include radio paging, public address
tie-in, 2 channels of program distribution, and emer-
gency elevator annunciation.
Contractor shall observe all local and national electrical
Microprocessor Intercom System
The CB901 is a fully electronic, microprocessor controlled
system, which fully satisfies the requirements for a modern and
effective internal communication system. The CB901 system is
modular in concept and the central exchange can be expanded
in multiples of 8 stations, up to a maximum of 7200 total stations
(masters and/or remotes). The central exchange has a minimum
of 15 conversation paths (links), permitting up to (15) simulta-
neous conversations. More links can be added as an optional