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148Appendix
Appendix
Global Management System User’s Guide
ISDN Information
Service Prole Identiers
Service Prole Identiers (SPIDs) are only allocated by service providers in the United States
and Canada. Service providers in these markets create a service prole based on which ISDN
features you require, then assign you a unique Service Prole Identier (SPID) which allows you
to use these particular features.
Switch Type SPIDs Allocated
AT&T 5ESS Custom None
AT&T 5ESS NI-1 1 per B-channel
NT DMS-100 NI-1 1 per B-channel
NI-2 1 per device
Siemens EWSD NI-1 1 per B-channel
Siemens EWSD NI-2 1 per device
International (outside of United States
or Canada)
None
Depending on your ISDN variant, your ISDN line will have zero, one, or two assigned SPIDs.
The following table describes ISDN standard cause values that are sent from the ISDN switch
to the router to indicate ISDN call status.
Although the cause values are standardized, each ISDN service provider uses its own version of
the cause message wording. Therefore, the cause messages shown in the table below might not
be the exact messages that appear on the terminal.