APPENDIX A: Important ISDN Issues
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An inconsistency exists between the ISDN protocols used on different types of switches. National ISDN-1
standard does not allow access to both B channels with only one SPID. If you use National ISDN-1 or AT&T
Multipoint protocols on a 5ESS switch, it is possible that you will receive only 1 SPID for both B channels. The
Ethernet Extender also supports this configuration.
If this is the case, set the service provider ID (SPID) and the local phone (directory) number of channel A. It is
not necessary to set Channel B. This allows access to both B channels using the same phone number.
Summary of Contents for LB3104A series
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