Codes For Line/Trunk Jacks - AT&T MERLIN LEGEND Release 3.1 System Planning Manual

Identifying Line/Trunk Jacks
3. If the option is programmed on a 2-way trunk, the system will not seize a
trunk from the pool for an outgoing call when that trunk is receiving an
incoming call.
4. Use the LS-ID Delay option if the adjunct or application does not allow line
buttons to be set for Delay Ring.
Planning Form Instructions
Refer to the completed Control Unit Diagram on Form 1 to mark line/trunk jack
types on Form 2c:
1. For each module with line/trunk jacks noted in the Control Unit Diagram
(beginning with Slot 01), write in the type of module and its slot number in
the Module Type and Slot No. column of Form 2c; after the appropriate
Log. ID number, draw a line to indicate the logical IDs (and therefore, the
line/trunk jacks) that correspond to that module.
If the system has 100D (DS1) modules, keep in mind that even though
the module has only one physical jack, the 100D module supports up to
24 endpoints or extensions. Therefore, 24 logical IDs and associated
line/trunk numbers are assigned to each module.
Likewise, the 800 NI-BRI module supports up to 16 endpoints or
extensions, therefore 16 logical IDs and associated line/trunk numbers
are assigned to each 800 NI-BRI module even thought the module has
only eight physical jacks.
2. In the Jack Type column of Form 2c, for all modules except 100D
modules, write the jack type for each logical ID. Use the codes shown in
Table 3–2.
Table 3–2. Codes for Line/Trunk Jacks
Jack Type Code
LS
GS/LS
DID
Tie
T1-GS
T1-LS
*
T1-Tie
T1-DID
T1-S56
PRI
BRI
*
T1 Switched 56 digital data is also available using T1-Tie trunks. See the "Tie Trunks"
section later in this chapter.
Line/Trunk Type
Loop-start
Ground-start/loop-start
DID
Tie
DS1 connectivity used to emulate GS
DS1 connectivity used to emulate LS
DS1 connectivity used to emulate tie or for digital data service
DS1 connectivity used to emulate DID
DS1 connectivity used for digital data
DS1 connectivity used for PRI service
NI-1 BRI
3–5
Lines/Trunks