IMG 1010 - ISDN Features
- Kelli Higdon
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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 Â 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
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