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Implementation Notes

3-3

D Channel Support

The router supports full 64 Kb/s D channel signaling as well as call setup and tear

down between the router and ISDN switch. The D channel implementation

complies with ITU-T (formerly CCITT) 1988 recommendations Q.921 and

Q.931, with signaling support for the following switches:

• Net5 for Austria, Belgium, Denmark, France, Germany, Italy, Netherlands,

Norway, Spain, Sweden, United Kingdom, Switzerland, Finland, Greece,

Iceland, Ireland, Luxembourg, Portugal

• AT&T 5ESS and 4ESS Custom and DMS-100 Custom for the United States

• DMS-100 Custom for Canada

• NTT and KDD for Japan

• TS014 for Australia

Bay Networks implementation does not allow you to send data across the D

channel.

S/T Interfaces

A router with built-in ISDN capability is a TE1 device, which is an ISDN-

compatible device. Your router, therefore, provides the S/T interface, which

deﬁnes the user-network boundary.

For BRI, this interface follows the standards outlined in the ITU-T

recommendation I.430, the physical layer protocol that deﬁnes the S/T interface.

For PRI, the interface follows the ITU-T recommendation I.431.

You only have an S interface if an NT2 device is present. An NT2 is a switch at

your site that connects your TE1 and TE2 equipment to the network.

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Avaya Configuring Dial Services Manual do Utilizador Página 53