Cisco Systems 700 manual Setting SPIDs Manually North America only, Set switch dms

Setting SPIDs Manually (North America only)

SPIDs can be detected automatically using the set autodetection command, or SPIDs can be entered manually, as described in this section.

If the service provider switch type is 5ESS Custom PPP, you do not need to enter SPIDs; go to the next section. If the service provider switch type is DMS-100, National (NI1), or 5ESS Multipoint, continue with this section.

To enter the SPIDs assigned by your ISDN service provider, take the following steps:

Step 1 Enter the set switch command to configure the ISDN switch type that is being used with your ISDN line:

>set switch dms

Step 2 Enter the set spid command to set the router’s SPID numbers:

>set 1 spid 0510198765430

>set 2 spid 0510187654320

You are ready to configure the router for a specific routing environment.

An AT&T 5ESS switch can support up to eight SPIDs per BRI line. Because multiple SPIDs can be applied to a single B channel, multiple services can be supported simultaneously. For example, the first B channel can be configured for data, and the second B channel can be configured for both voice and data. In this scenario, the second B channel can support an ISDN telephone in addition to supporting data connections. For 5ESS switches, the SPID is usually the 10-digit ISDN number beginning with “01” and ending with “0.” For example: ISDN number, 4085551212; SPID, 0140855512120. (There is no standard format for SPIDs. As a result, SPID values can vary, depending on the switch vendor and the carrier.)

DMS-100 and NI1 switches support only two SPIDs, with only one B channel per SPID. If both B channels will be used for data only, enter the two SPIDs (one for each B channel). An issue comes up when trying to run data and voice over the same B channel. Assuming the first SPID is applied to the first B channel for data traffic and is limited to that B channel only, this leaves only one other SPID for the second B channel.

Consequently, the second B channel can be used for either data or voice, but not both simultaneously. The absence or presence of the second SPID in the configuration dictates whether the second B channel can be used for data or voice. This is an example of SPID

Basic Configurations 3-7