Nortel DMS-100 Series Maintenance Manual page 174

3-14 ESA maintenance overview
Every line can have several call processing line states. The call processing
line states determine what the system does with a specified message. The
ESA CC first screens the line states of all messages.
The call process controller (CPC) handles all lines in the following states:
The system processes these lines based on the call processing state stored in
their CPB index. The CPC ignores all lines in the system busy (SysB) or
manual busy (ManB) states.
Refer to figure Terminal status table, on page 3-14, for a diagram of the TST.
Terminal status table
Line
640
297-8211-550 Standard 05.01 August 1999
idle
originate
abandon
lockout
call processing-busy (CPB)
Byte 1
5 4
7 6
0 Error count/cause
Error count/cause
2 1
3 0 7
Line state
Line state
Byte 1
5 4 2
6 3
CPB index/origination count
CPB index/origination count
1
0