Maintenance Commands and Trouble-Clearing Aids
555-233-123
8-312 Issue 4 May 2002
Layer 1
State
BRI Layer 1 (physical) state on the port. Valid states are “activated,”
“pend-activation,” and “deactivated.”
■ “activated” state = layer 1 frames are passing between the port
and BRI endpoints.
■ “pend-activation” state = the port is in-service, the layer 1
interface device is on, layer 1 frames are sending to the BRI
endpoints connected to this port, but BRI endpoints are not
responding.
■ “deactivated” state = the layer 1 interface device on the BRI is off,
because the port goes out-of-service.
TEI Value
Layer 2 addressing parameter used by the switch to exchange
information over point-to-point signaling links between BRI endpoints.
Each point-to-point signaling link has an associated TEI. This field
displays the addressing parameter value. (0–127)
Layer2
State
Point-to-point signaling link layer 2 state. Valid states are
“un-assigned,” “assigned,” “established,” “l3-established” or
“hyperactive.”
■ “un-assigned” = the link is in TEI-UNASSIGN state at Layer 2.
■ “assigned” state = the link is in the AWAIT_EST (Await Establish)
state at layer 2. (If BRI endpoints support TEI allocation
procedures, they successfully execute and a TEI is assigned to
the endpoint by the switch.
■ “established” = the link is in the MF_EST_NORM (Multi-Frame
Established Normal) state at layer 2. The switch successfully
initiates the link can now exchange layer 3 frames with the
endpoint. If the endpoint does not support SPID initialization
procedures, the endpoint extension associated with the link also
displays. This is the normal state for the link in the point-to-point
wiring configuration.
■ “l3-established” = link is in the MF_EST_NORM state at layer 2
and SPID initialization procedures successfully complete. The
endpoint extension associated with the link also displays. This is
the normal state for the link in the multi-point wiring configuration.
■ “hyperactive” = traffic on this link goes over threshold. The link
suspends and is deemed hyperactive.
Endpt
Extension
Voice/data endpoint extension associated with the link if the link is in
the “established” (point-to-point configuration) or “l3-established”
(multipoint configuration) layer 2 state. Otherwise, this field is blank.
Endpt SPID
This field displays the SPID administered on the voice/data endpoint
associated with the link. Note that this information is displayed only if
the link is in either the “established” (point-to-point configuration) or
the “13-established” (multipoint configuration) layer 2 state. Otherwise
this field is blank.
Service
SPID
Indicates if the link is associated with the Service SPID. If the link is
associated with Service SPIDs, the field contains a “yes” and the
endpoint extension field is blank; otherwise, this field is blank. Service
SPID checks building wiring between the switch and the BRI endpoint.
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