Defining Isdn Service Profile Identifiers; Configuring T1 And E1 Interfaces - Cisco 2620 Configuration Manual

Configuring T1 and E1 Interfaces

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
Router (config-if)# isdn spid2
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.
Configuring T1 and E1 Interfaces
To configure an ISDN PRI interface or T1/E1 multiflex trunk interface, use the configuration software
provided with your router or network module, if any. Otherwise, for greatest power and flexibility use
configuration mode (manual configuration). In this mode, you enter Cisco IOS commands at the router
prompt.
Note
Before you begin, disconnect all WAN cables from the router to keep it from trying to run the AutoInstall
process. The router tries to run AutoInstall whenever you power it on if there is a WAN connection on
both ends and the router does not have a valid configuration file stored in NVRAM (for instance, when
you add a new interface). It can take several minutes for the router to determine that AutoInstall is not
connected to a remote Transmission Control Protocol/Internet Protocol (TCP/IP) host.
This section describes basic configuration, including enabling the interface and specifying IP routing.
Depending on your own requirements and the protocols you plan to route, you might also need to enter
other configuration commands.
Before you begin configuring the interfaces, make sure you:
•
•
Software Configuration Guide for Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Routers
3-14
Connect a console to the router.
Power on the router.
Chapter 3
spid-number ldn
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spid-number ldn
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Configuring with the Command-Line Interface
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