Table 2-1. Line/Trunk And Station Modules; Continued On Next Page - AT&T MERLIN LEGEND Release 2.0 Equipment And Operations Manual

Hardware Components

Table 2-1. Line/Trunk and Station Modules

Module Line/Trunk Type
N/A
008
ma MLX N/A
1
008 OPT N/A
N/A
012
100D T1 or PRI
2
400
LS and TTR
Station Type
Analog multiline Capacity:
telephone; CMS Signaling: analog multiline telephone protocol (40 kbps)
Loop range: 1000 feet (305 meters). For In-Range Out-of-Building
service, use
use Off-Premises Range Extender (OPRE).
Capacity: 8 digital stations, each with 1 or
MLX telephone; digital
data device (such as endpoint is assigned
7500B Data Module)
following station types:
digital
digital
digital voice
digital voice and Multi-Function Module (MFM)
digital data only (7500B Data Module)
Signaling: BRI S/T protocol (two 64-kbps B-channels, one 16-kbps
D-channel) on a passive
Power: 48 VDC phantom power to telephone; 48 VDC over a
separate pair (7-8) to a Direct Station Selector (DSS) console
Loop range: 1000 feet (305 meters).
service, use MLX IROB protectors, over 1000 feet (305 meters), use
OPRE.
Capacity:
On-premises or off-
premises single-line support for telephones with message-waiting LEDs, 2 TTRs
telephone Notice to telephone company: meets FCC Class C
Ringing current: 105-Vrms, 30-Hz sinusoidal ringing superimposed
on -48 VDC: a ring generator must be installed in the power supply
of each earner that has a 008 OPT module.
REN: ≤1.0 per port
Disconnect signal, 900 ms (T/R short for answering machines,
Group Ill Fax, etc.)
Switchhook flash detection: 3001200 ms
Loop resistance: serves 2-wire loops to 1300 ohms, including
stations
Single-line telephone; Capacity: 12 T/R stations on 2-way voice transmission path with
MERLIN Attendant; support for telephones with message-waiting LEDs, 2 TTRs
MERLIN MAIL Voice Power. 21 VDC, 800-ohm battery source
Ringing current: 105-Vrms, 30-HZ sinusoidal ringing superimposed
Messaging System;
T/R on -48 VDC; a ring generator must be installed in the power supply
adjunct (such as
module of each carrier that has a 012 module.
answering or fax
REN: ≤1.0 per port
maachine): Analog data
Disconnect
device (such as
modem) Group Ill Fax, etc.)
Switchhook flash detection: 300-1200 ms
Loop range: 1000 feet (305 meters), in-building only
Capacity:
lines/trunks for voice and data with 1 channel used for signaling
Mode: multiplexes 24 or 23 lines/trunks into one facility and
demultiplexes one facility into 23 or 24 lines/trunks
speed:
Signaling: DS1 over 4-wire; T1 uses Robbed Bit Signaling (RBS) or
Common Channel Signaling (CCS): PRI has 23 B + D
Power Failure Transfer Capacity: 4 lines/trunks, 4 TTRs, 1 PFT telephone
(PFT) telephone Signaling: loop-start
Specifications
8 analog stations
analog I ROB protectors, over 1000 feet (305 meters),
an individual extension number), including the
voice only
voice with Voice Announce to Busy feature
and digital data (via the 7500B Data Module)
bus
For In-Range Out-of-Building
8 T/R stations on two-way voice transmission path with
signal: 900
ms (T/R short for answering machines,
24 lines/trunks for voice and analog data or 23
up to 64 kbps

Continued on next page

Control Unit 2-7
2 endpoints (each