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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Screen reference
842Multifrequency-Signaling-Related System Parameters
17
toll-operator
This signal, used in China, is treated as a normal subscriber signal. See the normal
definition.
Group A signals
Group A signals are backward signals generated by the destination switch.
send-ani
The CO sends this signal to request calling-party category and sends additional
signals to request ANI digits. This signal is sent to the CO when DEFINITY ECS
requests ANI digits on DID calls. This signal is used on both DOD and DID calls.
congestion
The CO sends this signal to indicate that it is experiencing network congestion.
When the switch receives this signal on DOD calls, the switch drops the trunk and
plays reorder tone to the calling party. This signal is used on DOD calls.
drop
When this signal is sent, the receiving switch starts the disconnect sequence.
end-of-dial
This signal is sent to indicate the end of the address digit string. For MF group II
calls, this signal requests a group II signal and switches the sender over to the
group B signaling mode. This signal is used on both DID and DOD calls.
intercept
The CO sends this signal to indicate the call has been terminated to an invalid
destination. When the switch receives this signal on DOD calls, the switch drops
the trunk and plays intercept tone to the calling party. This signal is used on DOD
calls.
resend-digit
The switch sends this signal to adjust the outpulsing pointer so that the last digit
can be resent again. This signal is used on DOD calls.
last-digit
The switch sends this signal to adjust the outpulsing pointer so that the last 2 digits
can be resent. This signal is used on DOD calls.