Coding Line Type - AT&T MERLIN LEGEND Key System Planning

Lines
Planning Form Instructions
Review the module listed on the "Contrrol Unit Diagram" on Form 1.
On Key System Form 2c, System Numbering — Line Jacks:
1.
Write the type of each line jack in the control unit in the "Jack Type"
column. Use the codes shown in Table 3-2.
For systems that include the 100D module:
2.
If the module is used only to emulate lines:
Fill in the jack type codes for those lines (T1-GS, T1-LS, or T1-Tie).
Write only "T1" in the "Jack Type" column for any of the channels not
used at this time.
3.
If the module is used to connect services:
Write "T1-Tie" in the "Jack Type" column for those T1-type module
channels where the services are assigned.
Write "PRI" in the "Jack Type" column for all 24 logical IDs of the ISDN -
PRI-type modulles.
Table 3-2 Coding Line Type
Jack Type Code Line Type
LS Loop-Start
GS/LS Ground-Start/Loop-Start
Tie Tie
T1-GS
DS1 facility used to emulate GS
T1-LS
DS1 facility used to emulate LS
T1-Tie
DS1 facility used to emulate tie or for digital service
PRI
DS1 facility used for ISDN-PRI service
3-3
Line Connections