Filter
Top Products
MERLIN LEGEND Communications System Release 6.1
Network Reference
555-661-150
Issue 1
August 1998
Network Management
Page 5-20Switch Identifiers
5
NOTES:
1. The Enter Switch Number screens for the switch identifier
procedures include a Help option that supplies most of the
information above.
2. For information about DEFINITY ECS or DEFINITY ProLogix
systems, consult the documentation for the system.
A switch identifier should be unique across a private network. This helps avoid a
situation called
automatic immediate cycling
. For example, when the switch
identifiers for the incoming trunks and the automatically selected outgoing trunks
for a call match indicating the tandem call would return to the originating switch,
another route for the call is selected if possible. However, if all available routes
specify systems with matching switch identifiers, the caller hears a fast-busy tone.
The call is routed to the destination system and then back to the originating
system in a continuous loop, until all available trunks are used.
A switch may be a satellite for one private networked system but not a satellite for
another private networked system. In this case, a system may have more than
one switch identifier. For example, in the diagram below, System D is located
within 200 miles of System E but more than 200 miles from System F in the same
private network. In this case, the switch identifier for System D as specified in
System E is different from the identifier for System D as specified in System F.
This topic includes procedures for adding a switch identifier to a single trunk or to
a block of sequentially numbered trunks.
Valid Entries
Unassigned, 1–20, 21–40, 41–50, 51–60
Task List: Switch Identifiers 5
o Obtain Form 2c, System Numbering: Line/Trunk Jacks.
o Plan changed or new switch identifiers using the planning guidelines above
and after consulting other system managers in the private network. Record
the new values on the form.
o Open the System Programming menu from the console or a PC with SPM.
o Program the change(s), following the instructions below or those for
“Switch Identifiers” in the “UDP Facilities” section of
System Programming
.
o When you have finished, file the form with the rest of the planning forms.
System D
System F
System E
20
21
02
03
NY, NY
Queens, NY
Atlanta, GA
tandem
trunk
tandem
trunk