Nortel DMS-100 Series Maintenance Manual page 143

The signaling states and call processing data that are part of the CPB are
• CPB states
— Call processing idle (CP_Idle): This is the start-up state before call
processing. The line resources (digitone receiver [DTR] and
connection) are requested.
— Dialing: The SERVER receives the digits - Digit translation occurs
when the system receives a digit report.
— Routing: This is a changing state from Dialing or CP_Idle to another
state.
— Revertive wait for on-hook: This call is revertive. The system waits
for the call originator to go on-hook before the system applies ringing.
— Ringing: The system applies ringing to the call terminator. The system
supplies audible ringing to the call originator. If the call is a revertive
call and the office has coded ringing, the system applies a ring splash
to the opposite side of the terminator.
— Talking: a voice connection between the call originator and terminator.
The tip and ring return relay are restored for semipost- paid coin line.
— Originator disconnected: The originator goes on hook first. The
originating line is idled. Supervision continues on the terminating line.
— Terminator disconnected: The terminator goes on hook first. The
terminating line is idled. Supervision continues on the originating line.
Lines with a cutoff-on-disconnect feature have the cutoff relay
operated.
— Release originator: A changing state where the originator is released
from call processing.
— Busy: The system applies a busy tone to the originating line.
Supervision and timing occur on the terminal.
— Reorder: The system applies a reorder tone to the terminal.
Supervision and timing occur on the terminal.
— Coin disconnect supervise: The originating coin line goes on hook
first. The system performs the coin release function. Call processing
DMS-100 Family NA100 Star Remote System XPM15 and up
ESA maintenance overview 5-7