Trunk Jack Types - AT&T MERLIN LEGEND Communications System PBX System Planning Manual

Trunks
Table 3-1 Trunk Jack Types
Trunk Jack Type
Loop-start (LS)
Ground-start/Loop-start (GS/LS)
DID
Tie
DS1
See "DSI Facility (1OOD Module)" in this
chapter for information on ISDN-PRI
services.
3-2 Trunk Connections
Module Type Trunk Type
400 Basic
800 Special purpose
408 —FX, WATS
Basic
400 GS/LS/TTR
800 GS/LS Special purpose
408 GS/LS —FX, WATS
800 DID DID
400EM Tie
100D T1
ISDN-PRI
If the system has 100D (DS1) modules, keep in mind that 24 logical IDs and
associated trunk numbers are assigned to each module.
When the system is first set up, it automatically assigns the T1 type to the facility
connected on a 100D module. This means you can dedicate the channels for
use as T1 -type facility trunks and use the channels to emulate any combination
of loop-start, ground-start, and/or tie trunks. If this is the case, your local
telephone company supplies the telephone numbers associated with each of
the channels on the DS1 facility.
You can also connect certain digital services such as Megacom
TI -type facility or change the module's service type to ISDN Primary Rate
Interface (ISDN-PRI) to allow connection of services such as Accunet
Digital Service.
Note: You cannot mix T1 and ISDN-PRI types of service on the same 100D
module.
Used to Connect
Equipment
Music-on-Hold
Loudspeaker paging systems
Maintenance Alarm
Music-on-Hold
Loudspeaker paging systems
Maintenance Alarm
®
800 to the
®
Switched