Cisco 1600R Installationsanleitung PDF herunterladen (Seite 69)

Configuring the ISDN Line B-5

Defining ISDN Service Profile Identifiers

Deﬁning ISDN Service Proﬁle Identiﬁers

An ISDN service provider, usually a telephone company, can offer a variety of services.

Many providers use service proﬁle identiﬁers (SPIDs) to identify the device that is using

the ISDN service, similar to the way that the telephone company uses a telephone number

to identify your standard telephone service. If you use a service provider that requires

SPIDs, the provider assigns your ISDN device one or more SPIDs when you ﬁrst subscribe

to the service. Providers use different numbering schemes, but a SPID is usually a

seven-digit telephone number, plus some optional numbers. The provider also assigns your

device one or two local directory numbers (LDNs), which function as the router telephone

numbers. The LDN is the number that a remote router dials to make a call to the router.

Note SPIDs have signiﬁcance only at the local-access ISDN interface. The remote router

is assigned a SPID when the ISDN BRI services are ordered for that router.

When your ISDN device accesses the switch to initialize the connection, ﬁrst it must send

any assigned SPID(s) to the service provider. Otherwise, your ISDN device cannot place or

receive calls. Use the isdn spid command to deﬁne the SPID and the LDN on the router for

both ISDN BRI B channels, as follows:

Router(config-if)# isdn spid1

spid-number

[

ldn

]

Router(config-if)# isdn spid2

spid-number

[

ldn

]

Note Although the LDN is usually optional, it might be required so that the router answers

calls made to the second directory number.

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Cisco 1600R Installationsanleitung Seite 69