Line/Trunk And Station Modules - AT&T MERLIN LEGEND System Reference Manual

Hardware
Table 5-1

Line/Trunk and Station Modules

Line/Trunk Type
Module
N / A
008
N/A
008 MLX
N/A
008 OPT
N/A
012
T1 or PRI
100D
* The system software recognizes the OPT module as a 012 module. Even though the OPT module only has 8 jacks, it uses 12 ports of
capacity, thereby decreasing overall station capacity by four stations for every OPT module.
5-8 Control Unit
Station Type
Analog multiline
Capacity:
telephone
Signaling: analog multiling telephone protocol (40 kbps)
C M S
Loop range: 1000 feet in-building or in-range out-of-building (with
analog IROB protectors) service only
MLX telephone
Capacity: 8 digital stations, each with 1 or 2 endpoints (each
digital data device
endoint is assigned an individual extension number), including the
(such as ISDN
following station types:
7500B Data
digital voice only
M o d u l e )
digital voice with Voice Announce to Busy feature
digital voice and digital data (via the 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 a system operator DSS console
Loop range: 1000 feet, in-building and in-range out-of-building (with
MLX IROB protectors) only service
Capacity: 8 T/R stations* on two-way voice transmission path with
On-premises or off-
support for telephones with message-waiting LEDs, 2 TTRs
premises single-line
Notice to telephone company: meets FCC Class C
telephone
Ringing Current: 105-Vrms, 30-Hz sinusoidal ringing superimposed
on -48 VDC; a ring generator must be installed in the power supply
module of each carrier that has a 008 OPT module.
REN:
Disconnect signal: 900 ms (T/R short for answering machines, G3 fax,
e t c . )
Switchhook flash detection: 300 - 1200 ms
Loop resistance: serves 2-wire loops to 1300 ohms, including stations
Capacity: 12 T/R stations on 2-way voice transmission path with
Single-line
support for telephones wioth message-waiting LEDs, 2 TTRs
telephone
Power: 21-VDC, 600-ohm battery source
MERLIN Attendant
Ringing current: 105-Vrms, 30-Hz sinusoidal ringing superimposed
MERLIN MAIL
on -48 VDC; a ring generator must be installed in the power supply
Voice Messaging
module of each carrier that has a 012 module.
S y s t e m
T/R adjunct (such REN:
Disconnect signal: 900 ms (T/R short for answering machines, G3
as an answering
or fax machine)
Analog data device Switchhook flash detection: 300 - 1200 ms
(such as a Loop range: 1000 feet, in-building and in-range out-of-building
modem)
Capacity: 24 lines/trunks for voice and analog data or 23 lines/trunks for
voice and data with 1 channel used for signaling
Mode: multiplexes 24 or 23 lines/trunks into 1 facility and demultiplexes
1 facility into 23 or 24 lines/trunks
Speed:
Signaling: DS1 or 4-wire; T1 uses RBS or CCS;
PRI has ISDN-PRI (23 B + D)
Specifications
8 analog stations
1.0 per port
1.0 per port
fax, etc.)
service only
up to 64 kbps