Group ID

An administered number that identifies the signaling group.

Type

For information about signalling group types, see Maintenance Alarms for Avaya Aura® Communication Manager, Branch Gateways Servers.

• facility associated signaling: Every member is carried on a single DS1-associated facility. Facility-associated signaling groups support only simplex D-channel configurations.

• non-facility associated signaling: Members can include trunks on several different associated DS1 facilities.

• An explicit identifier specifies members of the DS1 trunk group across its ISDN-PRI link. A single D-channel on one facility provides signaling for every member. With D-channel backup, a second D-channel is assigned to assume control of signaling if the primary D-channel fails.

Group State

in-service: one of the D-channels signaling for the group is in service

out-of-service: neither D-channel in the group is in service If there is no D-channel backup and the primary D-channel is out-of-service, the signaling group is in an out-of-service state.

Link

Link transporting the D-channel

Port

Address of the port transporting either the primary or secondary D-channel

Q-SIP Reference Signaling Group

Displayed only when the Group Type field is sip or h.323. If a signaling group is used as a QSIG over SIP signaling group, the Q-SIP Reference Signaling Group field displays the reference signaling group.

Level 3 State

State of the primary or secondary D-channels:

• in-service: the D-channel is in the multiple-frame-established state at layer 2 carrying normal call-control signaling at layer 3.

• standby: the D-channel is in the multiple-frame-established state at layer 2, and not carrying any layer 3 call-control messages on logical link 0,0.

• wait: an attempt has been made by one side of the interface to establish layer 3 peer communications as part of the process of going to the “in-service” state, which is transitional in nature. Only when the ISDN SERVICE message is sent over the interface, and the far end of the interface responds with a SERVICE ACKnowledge message is the D-channel placed in the “in-service” state.

• maintenance-busy: the D-channel is not in the multiple-frame-established state at layer 2. This state is entered automatically when an active D-channel is declared failed. A D-channel that has been placed in the “maintenance-busy” state may be placed in the “out-of-service” state without system technician intervention.

• manual-out-of-service: system technician intervention has caused the D-channel to be placed in the TEI-assigned state at layer 2. System Technician intervention is required to retrieve a D-channel from this state.

• out-of-service: the D-channel is in the TEI-assigned state at layer 2, but is periodically requested by layer 3 to attempt to establish the link.

• no-link: no link is administered for the D-channel