ISDN Features

 

Basic Support

 

Supported Variants

T1 Network Side Variants

 

T1 User Side Variants

 

E1 Network Side Variants

 

E1 User Side Variants

 

D channel backup

The IMG supports the D channel backup procedure as defined by Lucent TR 41459. This procedure provides a standby D channel when using NFAS. When an active D channel fails, or if there is a span alarm, the IMG converts to the standby D channel and maintains active calls. This is a provisioned option and is applicable only when using NFAS. D channel backup is supported on the T1 only.

 

NFAS

NFAS is supported over T1 with the NI-2, 4ESS/5ESS, and DMS 100/250 variants. It is not supported over E1 with the Euro ISDN variant, or over T1 with the JATE variant.

 

Interworking

ISDN to SS7 ISUP, SIP, and H.323