AT&T MERLIN LEGEND Pocket Reference page 35

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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