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Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers

OL-1957-03

Chapter 3 Configuring with the Command-Line Interface

Configuring ISDN BRI WAN Interface Cards

Defining ISDN Service Profile Identifiers

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

routers 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 router. To define SPIDs

and the local directory number (LDN) on the router for both ISDN BRI B channels, use the following

isdn spid commands:

Router (config-if)# isdn spid1 spid-number [ldn]

Router (config-if)# isdn spid2

spid-number [ldn]

Note Although the LDN is an optional parameter in the command, you might need to enter it so the router

can answer calls made to the second directory number.

For further information on configuring ISDN, see the chapters “Configuring ISDN” and “Configuring

DDR” in the Wide-Area Networking Configuration Guide publication, for your Cisco IOS software

release.

5ESS National ISDN (NI-1) BRI Terminal type = A

2 B channels for voice or data

2 directory numbers assigned by service provider

2 SPIDs required, assigned by service provider

Set speed for ISDN calls to 56 kbps outside local exchange

Directory number 1 can hunt to directory number 2

DMS-100 BRI 2 B channels for voice or data

2 directory numbers assigned by service provider

2 SPIDs required, assigned by service provider

Functional signaling

Dynamic terminal endpoint identifier (TEI) assignment

Maximum number of keys = 64

Release key = no, or key number = no

Ringing indicator = no

EKTS = no

PVC = 2

Request delivery of calling line ID on Centrex lines

Set speed for ISDN calls to 56 kbps outside local exchange

Directory number 1 can hunt to directory number 2

Table 3-7 ISDN Provisioning by Switch Type (continued)

Switch Type Provisioning

1 2 ... 71 72 73 74 75 76 77 78 79 80 81 ... 197 198

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