Nortel DMS-100 Series Maintenance Manual page 137

— ManB: The line is ManB. Service is suspended to the line. The
system ignores messages from the line. Calls cannot terminate to
this line.
— Idle: The line is equipped. The line is call-processing idle. The line
looks for an off-hook condition. Origination messages from the line
are treated as a call origination, and calls can terminate to this line.
— Originated: The line originates a call, but resources are not available
to service the line. If the line remains off-hook, the line originates
the call again after a 1 s delay. If an on-hook message is received
before the 1 s timer expires, the line goes to the abandon state. The
line can originate again three times before the line goes to the
lockout state. Calls cannot terminate to this line.
— Abandon: The line waits for another origination attempt. Off-hook
or on-hook messages put the line in the idle state. When in the idle
state, idle scan for an off-hook condition starts. Calls cannot
terminate to this line.
— Call processing busy: The line is in a call-processing-busy state. In
this state, a CPB associates with the line. The associated CPB index
is in the second byte of the TST. The system directs messages, that
the line generates, to the associated CPB index. Calls cannot
terminate to this line.
— Lockout: The line is not involved with an active call. A CPB does
not associate with the line, but the line is monitored for an on-hook
condition. An on-hook message causes the line to return to an idle
state. When in the idle state, the idle scan for an off-hook condition
starts. Calls cannot terminate to this line.
— SysB: The system detects too many errors on the line. The line is
put out of service. The last cause of the error is stored in the error
count/cause byte of the TST. The system ignores messages from the
line.
The ESA line-audit process returns the line to service.
The second byte in the TST contains the CPB index/origination count. A
CPB is the data base that associates with an active call process. An adequate
number CPBs are available to handle the maximum number of intra- and
interswitched calls. The number of ESA calls that the system supports is
less than the number of lines that the system supports. This state results in
not enough available CPBs for the available channels. The signaling states
and call processing data that comprise the CPB are:
CPB states:
— Call processing idle (CP_Idle): The start-up state before call
processing. The line resources (DTR and connection) are requested.
DMS-100 Family RLCM Maintenance Manual XPM12 and up
ESA maintenance overview 3-15