3com 3031 Instruccion De Instalación

C

HAPTER

 21: ISDN C

ONFIGURATION

The ISDN network uses SPID (Service Profile Identification) as the ID of different 
services, and the switch provides the corresponding service to the terminal user 
according to the SPID. Each B channel corresponds to a SPID. Only after having 
employed the SPID to perform the SPID handshake interaction, can the user 
proceed with normal calling and disconnection process. Therefore, after the Q921 
establishes link successfully and before the Q931 calling processing starts, the user 
needs to obtain SPID to interact with the switch to perform the Layer 3 (Q931) 
initialization, then he can start normal calling and disconnect process., otherwise, 
the calling will fail.

ISDN configuration includes:

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Setting ISDN protocol type

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Configuring the negotiation parameters of ISDN Layer 3 protocol

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Configuring the SPID parameters of ISDN NI protocol

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Set the called number and sub-address to be checked during a digital incoming 
call

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Configure to send calling number during an outgoing call

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Set the local management ISDN B channel

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Configure ISDN B channel selection mode

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Configure the size of an ISDN sliding window

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Configure statistics about ISDN message receiving/sending

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Configure to check the calling number when a incoming ISDN call comes

Perform the following configuration in interface view.

The ISDN protocol can be DSS1, NTT, NI, ETSI, ANSI or AT&T.

By default, the ISDN protocol on the PRI interface is the DSS1 protocol.

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Perform the following configuration in interface view.

Table 288   Setting ISDN protocol type

Set ISDN protocol type

Table 289   Configuring the negotiation parameters of ISDN Layer 3 protocol