NEC NEAX2400 ICS, Руководство по программированию

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NEAX2400 IPX Feature Programming Manual
Page 736
NDA-24297, Issue 1
T-2 Three-Way Calling
T-2 Three-Way Calling
General Description
This feature enables any user to add another party to an existing connection, establishing a three-way conference.
Even if the additional D
term
user holds the call, THREE-WAY CALLING may be established. (This service is called
Consultation Hold.)
Operating Procedure
Procedure 1
1. Press switch hook; first party is placed on Consultation Hold; receive special dial tone.
2. Dial the desired number; receive answer.
3. Announce the conference and press switch hook again.
4. The THREE-WAY CALLING is now established.
Procedure 2
1. While connected with the first party, press the switch hook; receive special dial tone. The first party is
placed on hold.
2. Dial the second party (D
term
); receive ring back tone.
3. The second party answers; the CONSULTATION HOLD - ALL CALLS state has been entered.
4. The second party presses the HOLD key and the call in progress is held.
5. Press the switch hook and return to the original call.
6. The second party or another D
term
station in the same Multi Line group answers the held call.
7. THREE-WAY CALLING is established.
Service Conditions
1. The originating party may hang up at any time. The remaining two parties will not be disconnected.
2. This feature may be activated during any call.
3. Any combination of parties (internal or external) may be included in a three-way call.
4. The maximum number of simultaneous three-way calls depends on the quantity of digital conference
trunks within the system. One digital conference trunk circuit card can handle 8 simultaneous 3-way calls.
5. The THREE-WAY CALLING feature is not restricted by the line class of service assigned to the user’s
line; thus, a fully restricted station can transfer a call to another station or the Attendant.
When the Consultation Hold service is used
1. Service restriction class of stations may be assigned at each station.
2. This service is not available when THREE-WAY CALLING has been established.
3. After the originating party presses the switch hook, the station can only go on-hook and press the switch
hook. The party in conversation can only operate on-hook.
4. This service is not available when the transferred call is held by CALL HOLD and so on.
5. When the additional station answers the held call, whether to send Override Tone or not depends on the
originating station service restriction class.
6. The Conference Trunk (CFT) function is required for the node which accommodates the station operating
a three-way conference within the FCCS network.
7. Three-Way Calling can also be established when using the trunk belonging to the remote node within the
FCCS network.