Table of Contents

Configuring the ISDN Line

ISDN BRI Line Configuration Requirements
ISDN BRI Switch Types
ISDN BRI Provisioning by Switch Type
Defining ISDN Service Profile Identifiers
ISDN Configuration Options
Snapshot Routing over ISDN
Dial-on-Demand Routing Over ISDN
Bandwidth on Demand and Dial Backup over ISDN

Configuring the ISDN Line

This appendix describes how to order and configure an Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) line for operation with a Cisco 1600 series router that has an ISDN BRI interface or a Cisco 1600 series router that has an ISDN BRI WIC installed.

This appendix contains the following sections:

• ISDN BRI Line Configuration Requirements
  

• ISDN BRI Switch Types
  

• ISDN BRI Provisioning by Switch Type
  

• Defining ISDN Service Profile Identifiers
  

• ISDN Configuration Options
  

ISDN BRI Line Configuration Requirements

Before using a Cisco 1600 series router with an ISDN BRI interface or a Cisco 1600 series router with an ISDN BRI WIC installed, you must order a correctly configured ISDN BRI line from your local telecommunications service provider.

This process varies dramatically from provider to provider on a national and international basis. However, following are some general guidelines:

• Ask for two channels to be called by one number.
  

• Ask for delivery of calling line identification This is also known as Caller ID or Automatic Number Identification (ANI).
  

• If the router is going to be the only device attached to the ISDN BRI line, ask for point-to-point service and a data-only line.
  

• If you will be connecting another ISDN device (such as an ISDN telephone) to the ISDN BRI line through the router, ask for point-to-multipoint service (subaddressing is required) and a voice-and-data line.
  

ISDN BRI Switch Types

ISDN BRI supports a variety of service provider switches. Table B-1 lists, by geographic areas, the ISDN switch types supported by the Cisco 1600 series routers' ISDN BRI interface. The corresponding keywords are used when configuring the router with the isdn switch-type command.

Table B-1 : ISDN BRI Switch Types

Switch Type	Keywords
Australia
Australian TS013 switches	basic-ts013
Europe
German 1TR6 ISDN switches	basic-1tr6
Norway NET3 switches (phase 1)	basic-nwnet3
NET3 ISDN switches (UK and others)	basic-net3
French VN2 ISDN switches	vn2
French VN3 ISDN switches	vn3
Japan
Japanese NTT ISDN switches	ntt
North America
AT&T basic rate switches	basic-5ess
NT DMS-100 basic rate switches	basic-dms100
National ISDN-1 switches	basic-ni1
New Zealand
New Zealand Net3 switches	basic-nznet3

ISDN BRI Provisioning by Switch Type

The term ISDN BRI provisioning refers to the types of services that the ISDN BRI line is configured for. Although the ISDN BRI provisioning is performed by your ISDN BRI service provider, the person who orders the ISDN BRI line must indicate to the service provider the desired provisioning.

Table B-2 list the provisioning that should be ordered for the router based on switch type.

Table B-2 : ISDN Provisioning by Switch Type

Switch Type	Provisioning
5ESS Custom BRI	For data only 2 B channels for data Point to point Terminal type = E 1 directory number (DN) assigned by service provider MTERM = 1 Request delivery of calling line ID on Centrex lines Set speed for ISDN calls to 56 K outside local exchange
5ESS Custom BRI	For voice and data (Use these values only if you have an ISDN telephone connected.) 2 B channels for voice or data Multipoint Terminal type = D 2 directory numbers assigned by service provider 2 service profile identifiers (SPIDs) required, assigned by service provider MTERM = 2 Number of call appearances = 1 Display = No Ringing/idle call appearances = idle Autohold= no Onetouch = no Request delivery of calling line ID on Centrex lines Set speed for ISDN calls to 56 K outside local exchange Directory number 1 can hunt to directory number 2
5ESS National ISDN (NI-1) BRI	Terminal type = A 2 B channels for voice and data 2 directory numbers assigned by service provider 2 SPIDs required; assigned by service provider Set speed for ISDN calls to 56 K outside local exchange Directory number 1 can hunt to directory number 2
DMS-100 BRI	2 B channels for voice and data 2 directory numbers assigned by service provider 2 SPIDs required; assigned by service provider Functional signaling Dynamic terminal endpoint identifier (TEI) assignment Maximum number of keys = 64 Release key = no, or key number = no Ringing indicator = no EKTS = no PVC = 2 Request delivery of calling line ID on Centrex lines Set speed for ISDN calls to 56 K outside local exchange Directory number 1 can hunt to directory number 2

Defining ISDN Service Profile Identifiers

All ISDN devices subscribe to services provided by an ISDN service provider, usually a telephone company. However, only some service providers use service profile identifiers (SPIDs) to define the services subscribed to by the ISDN device that is accessing the ISDN service provider. The service provider assigns the ISDN device one or more SPIDs when you first subscribe to the service. If you are using a service provider that requires SPIDs, your ISDN device cannot place or receive calls until it sends a valid, assigned SPID to the service provider when accessing the switch to initialize the connection.

Currently, only the DMS-100 and NI-1 switch types require SPIDs. The AT&T 5ESS switch type may support a SPID, but we recommend that you set up that ISDN service without SPIDs. In addition, SPIDs have significance at the local access ISDN interface only. Remote routers are never sent the SPID.

A SPID is usually a seven-digit telephone number with some optional numbers. However, service providers may use different numbering schemes. For the DMS-100 switch type, two SPIDs are assigned, one for each B channel. After your service provider has assigned you SPIDs, you must define these SPIDs on the router so that when access to the switch is attempted, the router has the valid information available.

To define the SPIDs and the local directory number (LDN) on the router for both both ISDN BRI B channels, use the isdn spid command as follows:

Router(config-if)# isdn spid1 spid-number [ldn]

Router(config-if)# isdn spid2 spid-number [ldn]