Line Jack Types - AT&T MERLIN LEGEND Key System Planning

Lines
Table 3-1 Line Jack Types
Line Jack Type
Loop-start (LS)
Ground-start/Loop-start
Tie
DS1
See "DSI Facility (100D Module)" later in
this chapter for information on ISDN-PRI
services.
3-2
Line Connections
Module Type
400
800
408
(GS/LS)
400 GS/LS/TTR
800 GS/LS
408 GS/LS
400EM
100D
If the system has 1OOD (DS1) modules, keep in mind that 24 logical IDs and
associated line 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 lines and use the channels to emulate any combination of loop-
start, ground-start lines, 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® 800 to the T1-
type facility or change the module's service type to ISDN Primary Rate Interface
(ISDN-PRI) to allow connection of services such as Accunet® Switched Digital
Service.
Note: You cannot mix T1 and ISDN-PRI types of service on the same 100D
module.
Used to Connect
Line Type
Basic
Special purpose
— FX, WATS
Basic
Special purpose
— FX, WATS
Tie
T1
ISDN-PRI
Equipment
Music-on-Hold
Loudspeaker paging systems
Maintenance Alarm
Music-on-Hold
Loudspeaker paging systems
Maintenance Alarm