Section 400-Programming
FF2: Trunk Programming (ISDN)
576-13-400
DBS 576 (USA) issued 05/20/98
●
Page 2-71
FF1
System
FF2
Trunks
FF3
Extensions
FF4
FF-/Soft Keys
FF5
Groups
FF6
TRS/ARS
0
System
Configuration
FF7
Applications
FF8
Maintenance
Introduction
Appendix A
Appendix B
FF1
System
FF2
Trunks
FF3
Extensions
FF4
FF-/Soft Keys
FF5
Groups
FF6
TRS/ARS
0
System
Configuration
FF7
Applications
FF8
Maintenance
Introduction
Appendix A
Appendix B
❒
Select 0 (system selects highest-numbered channel) if the CO cannot change channels when
“glare” occurs.
❒
Select 1 (system selects lowest-numbered channel) if the CO can change channels when “glare”
occurs.
Related Programming:
Notes:
In ISDN, Layers 1, 2 and 3 represent signaling levels over the D-channel. Layer 1 is the basic hardware
level that controls messages regarding electrical characteristics, such as speed, channel structure, etc.
Layer 2 is the “housekeeping” level, containing controls that make sure the messages coincide,
providing sequence and flow control, etc. Layer 3 is the feature level with messages that establish,
maintain, and terminate connections, as well as additional information for different applications, such as
passing the identity of the calling party, passing terminal compatibility information, allowing the
redirection of calls, etc.
Related Programming:
B-Channel Numbering (Layer 3) (pg. 3-32) (ISDN extensions) FF3 1 BSSC 03 01 Hold (0 or 1) Hold
B-Channel Numbering (Layer 3)
(all CPCs) - Version 1.0 or higher
Select the Layer 3 format of the messaging commands sent by the CO.
FF2 1 BSSC 03 10 Hold (0 or 1) Hold
0=Slot Mapping (default - U.S./China)
1=Channel Numbering (default - U.K.)
BSSC: ISDN Trunk Position
B=Cabinet no. 1-6
SS=Slot no. 01-12
C=Circuit no. 1-4 (BRI)
or 1 (PRI)
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