Instruction manual

Page 1170 of 3156 Conference
553-3001-306 Standard 10.00 January 2002
China – Supervised Analog Lines
If a terminal device answers an incoming call and then initiates a conference,
no battery reversal answer supervision signal is extended to the terminal
device when new parties of the conference answer. However, a hook flash
disconnect supervision signal is extended to the terminal device when the last
party in the conference disconnects.
If a terminal device initiates a conference, battery reversal answer supervision
is extended to the terminal device when the first party answers. No polarity
change is made when additional parties are added to the conference. The
polarity is reverted to normal when the terminal device disconnects or when
the last party in the conference disconnects.
China – Toll Call Loss Plan
Toll Loss Plan is not supported when a conference is in progress. When a
local party connecting to a toll call makes a conference call, the pad levels on
the ONS line card are switched back to their original (non-toll call) values.
Then, the existing Conference algorithm takes care of the necessary pad
switching. This would not alter the existing conference call in terms of loss
levels.
When a conference call joins in a toll call, the Toll Loss Plan is not effective.
When a conference call involving a toll call becomes a two-party call, the Toll
Loss Plan is applied on the set and DTI2 trunk.
The conference pad switching algorithm is not changed for the Toll Loss
Plan, since the 7 db requirement does not apply to a Conference call.
Controlled Class of Service
If Controlled Class of Service (CCOS) is activated at a telephone involved in
a conference call, established Central Office or toll calls are not affected. The
CCOS restriction level is applied immediately, and no new calls can be
initiated from the conference. The telephone remains in the CCOS active state
after the conference is terminated.