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Chapter 5
Configuring the Voice Interfaces
Defining ISDN Service Profile Identifiers
Note
BRI Direct-Inward Dialing Configuration
OL-2031-02
Some service providers assign service profile identifiers (SPIDs) to define the
services to which an ISDN device subscribes. If your service provider requires
SPIDs, your ISDN device cannot place or receive calls until it sends a valid SPID
to the service provider when initializing the connection.
A SPID is usually a seven-digit telephone number plus some optional numbers,
but service providers might use different numbering schemes. SPIDs have
significance at the local access ISDN interface only; remote Catalyst 4224s are
never sent the SPID.
Currently, only DMS-100 and NI-1 switch types require SPIDs. Two SPIDs are
assigned for the DMS-100 switch type, one for each B channel. The AT&T 5ESS
switch type might support SPIDs, but Cisco recommends that you set up that
ISDN service without SPIDs.
If your service provider assigns you SPIDs, you must define these SPIDs on the
Catalyst 4224. To define SPIDs and the local directory number (LDN) on the
gateway for both ISDN BRI B channels, use the following isdn spid commands:
c4224 (config-if)# isdn spid1 spid-number [ldn]
c4224 (config-if)# isdn spid2 spid-number [ldn]
Although the LDN is an optional parameter in the command, you might need
to enter it so the gateway can answer calls made to the second directory
number.
For further information on configuring ISDN, refer to the chapters "Configuring
ISDN" and "Configuring DDR" in the Wide-Area Networking Configuration
Guide.
The example illustrated in
direct-inward dialing (DID). This configuration allows the called number
information from the ISDN Q.931 setup message to be used for routing on an
ISDN line.
Catalyst 4224 Access Gateway Switch Software Configuration Guide
Figure 5-1
shows how to configure a BRI port for
ISDN BRI Configuration (H.323)
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Troubleshooting
