IMG 1010 - ISDN Features

Basic Support

• Gain Control on ISDN Channel Groups

• 32 D-Channels per IMG over T1/DS3

• 24 D Channels over or E1 (21 bearer + 3 signaling spans)

• ITU-T Q.921, Q.931-based

• Incoming B channel Negotiation

• Bearer Capabilities Override (see IMG 1010 - Bearer Capabilities Override)

Supported Variants

T1 Network Side Variants

• National-ISDN 2

• ATT 4ESS Q.931 PRI

• ATT5ESS Q.931 PRI (Custom)

• Northern Telecom DMS-100 Q.931 PRI (Custom)

• Northern Telecom DMS-250 Q.931 PRI

• JATE

• Net5 Q.931 (10.3.3 ER2)

T1 User Side Variants

• ATT 4ESS Q.931 PRI  User Side

• ATT 5ESS Q.931 PRI (Custom) User Side

• Northern Telecom DMS-100 Q.931 PRI (Custom) User Side

• Northern Telecom DMS-250 Q.931 PRI

• National-ISDN 2

• JATE

• Net5 Q.931 (10.3.3 ER2)

E1 Network Side Variants

• Euro-ISDN

E1 User Side Variants

• Euro-ISDN

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