Specifications

Specifications
Memory Sizes: large and small
Highlights: 68000 processor at 10 MHz, built-in modem;
built-in diagnostics; Key, Behind Switch, or Hybrid/PBX
mode option; RAM backup for 12 days
Ports: top RS-232C port for SMDR; bottom RS-232C port
for system programming PC
Power input: 117 VAC
Power output: +5 VDC (10 A), -5 VDC (2.50 A),
-48 VDC (2.05A)
Capacity: 54 unit loads
Capacity: 8 analog stations
Signaling: analog multiline telephone protocol (40 kbps)
Loop range: 1000 feet in-building or in-range out-of-building
(with analog IROB protectors) service only
Capacity: 8 digital stations, each with 1 or 2 endpoints (each
endpoint is assigned an individual extension number),
including the following station types:
■ digital voice only
■ digital voice with Voice Announce to Busy
■ digital voice and digital data (via ISDN 7500B Data Module)
■ digital voice and MFM
■ digital data only (ISDN 7500B Data Module)
Signaling: ISDN-BRI S/T protocol (two 64-kbps B channels,
one 16-kbps D channel) on a passive bus
Power: 48-VDC phantom power to telephone; 48 VDC over a
separate pair (7-8) to an operator DSS console
Loop range: 1000 feet, in-building and in-range out-of-
building (with MLX lROB protectors) service only
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