DEFINITY ECS Release 8.2 Maintenance for R8.2csi
555-233-119 Issue 1
April 2000
Maintenance Objects
3-868PE-BCHL (PRI Endpoint Port)
3
■Out-of-Service/Far-end (OOS/FE)
A B-channel is initialized to this state when administered. The switch
sends messages to the far-end terminal adapter to neg otiate the
B-channel into service. If the far-end terminal adapter does not respond to
the messages within a certain time p eriod, the service state remains
out-of-service, and maintenanc e periodically resends the messages. The
port is unusable for c alls incoming to the switc h and outgoing to the
terminal adapter (althoug h other ports in the PRI Endpoint can st ill be
used for incoming and outgoing cal ls).
■Out-of-Service/Near-end (OOS/NE)
This is the state of the port whenever one of the following is true: a
hardware failure exists on the signaling link, the NPE Cr osstal k Test fails, or
the port is busied out b y system technician. In this state, the port is
unusable for calls incomi ng to the switch or outgoin g to the terminal
adapter (although other p orts in the PRI Endpoint can still be used for
incoming and outg oing calls). No messag es are sent to the far-end
terminal adapter until the sig naling link comes b ack into service or until
the port is released by system technician.
■Maintenance/Far-end (MTC/FE)
This state is reached when the far-end termi nal adapter does not resp ond
to messages sent over the signaling link for a particu lar port after a certain
amount of time. This state is different from OOS/FE inasmuch as the
signaling link must be up initially and the B-c hannels must be in-service.
The switch periodically sends messages to the far-end terminal adapter in
an attempt to negotiate the p ort (B-channel) into service. The por t is
unusable for calls outgoing to the terminal adapter . However, the port
services incoming c all requests from the far-end (althoug h other ports of
the PRI Endpoint can still be used to answer calls incoming to the switch
or to place outgoing calls to the terminal adap ter). Note that transitions
into MTC/FE do not drop stable calls. Therefore, if the servic e state
changes from in-service to MTC/FE, stable calls are unaffected.
■Maintenance/Near-end (MTC/NE)
The port (B-channel) is in this state if the sig naling link (PKT-INT) is busied
out by system technician. The p ort (B-channel) is also temporari ly in this
state if the system technician has issued a test port PCSSpp l or a test
pri-endpoint <extension> l command. Note that transitions into MTC/NE
do not drop stab le calls. Therefore, a system technician-d emanded
busyout link lnk-no command does not d rop stable wideb and calls. In
this state, the B-channel is not usable eith er for new calls incoming to the
switch or for new calls outg oing to the terminal adap ter.
■Pending States (PEND)
If the near-end is expecti ng a timed response from the far-end for a
request to change the servic e state of a port, the state of the port reflec ts a
Pending state. For example, if the port is out-of-service/far-end and if an
in-service message is sent to the far-en d, the service state of the p ort is