Avaya DEFINITY Server CSI, Руководство по обслуживанию, Страница: 502 / 1930

Maintenance Commands
555-233-119 502
Issue 5 October 2002
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 maintenance-busy may be placed in out-of-service
without system technician intervention.
manual-out-of-service: the D-channel is in the TEI-assigned state at
layer 2 by system technician intervention. 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, and
is periodically requested by layer 3 to attempt to establish the link.
no-link: no link is administered for the D-channel