BRI Configuration Example Cont

ISDN

iadii switch -baaie-nl T

lntarfica briQ ip address 10,1.200,1 255.255.255-252 encapsulation PPP pop authentication chap isdn apidl S10SSS20010001 SES200L spid.2 51Q5552Q0EQQC1 555ZQQ2

dialer-gsoup 1

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Several ISDN service providers use CO switches that require dial-in numbers called SPIDs. The SPIDs are used to authenticate call requests that are within contract specifications. These switches include National ISDN and DMS-100 ISDN switches, as well as the AT&T 5ESS multipoint switch. SPIDs are used only in the United States and are typically not required for ISDN data communications applications. The service provider supplies the local SPID numbers. If uncertain, contact the service provider to determine if the SPIDs must be configured on your access routers.

Use the isdn spid1 and isdn spid2 commands to access the ISDN network when your router makes its call to the local ISDN exchange.

The isdn spid1 command syntax is shown in the figure for the first BRI 64-kbps channel. The field for Idn, if required, matches the number provided by the dialer map command.

The commands for isdn spidl and isdn spid2 are listed in the following table.

isdn spid1 and isdn spid2 Commands

Command

Description

spid-number

Number identifying the service to which you have subscribed. This value is usually a ten-digit telephone number followed by more digits. The ISDN service provider assigns this value.

Idn

(Optional) Seven-digit local directory number assigned by the ISDN service provider.

Note If you want the SPID to be automatically detected, you can specify 0 for the spid-number argument. You can also use the interface command isdn autodetect for SPID and switch type detection. This command is available in IOS Release 12.0(3)T and later.

The Idn parameter allows you to associate up to three local directory numbers with each SPID. This number must match the called-party information coming in from the ISDN switch in order to use both B channels on most switches.

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