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ASAI and Call Control
Issue 7 May 1998
4-3
1
If the state of the other calls at the station is as specified and there is an idle call appearance.
2
Call appearance previously selected for call origination.
3
Call_id does not exist.
4
Request should be made over the held call association; if made over the active call association, it is
denied.
5
An active party can be listen-disconnected from an alerting party only by a request to
third party listen-disconnect from all other parties on the call. An alerting party may not be
listen-disconnected.
6 An analog station which is alerting cannot be Single-Step Conferenced. A multi-function
station which is alerting and has an idle call appearance can be Single-Step conferenced.
Table 4-1. Call Control Acceptance in Various Call/Station States
Call Control Request
Active
St
Held
St
Alerting
St
Idle
St
Dialing
St
Bridged
St
Third Party Make Call no yes
1
yes
1
yes yes
2
yes
1
Third Party Take Control yes yes yes no
3
yes yes
Third Party Relinquish
Control
yes yes yes no
3
yes yes
Third Party Clear Call yes yes yes no
3
yes yes
Third Party Selective
Drop
yes no no no
3
yes no
Third Party Reconnect yes yes no no
3
no yes
Third Party Merge
4
yes yes no no
3
no no
Redirect Call no no yes no
3
no no
Third Party
Listen- Disconnect
yes yes yes
5
no
3
no yes
Third Party
Listen- Reconnect
yes yes yes no
3
no yes
Third Party Single-Step
Conference
no yes
1
no/yes
6
yes no yes
1
Third Party Send DTMF
Signals
yes no no no
3
no no
Third Party Hold yes yes no no
3
no no