NEC Portrait 308, Feature Handbook

Page: 82 / 97

Note: Central Office Loop Supervision must be provided to prevent
lines from remaining conferenced/busy when the parties hang up.
Note: When both outside parties finish the
call, unsupervised conference must be man-
ually terminated by the telephone which set
up the call.
1. Establish first outside call.
2. Press .
●
The call is put on Hold.
3. Establish second outside call.
4. Press .
●
Three-party Conference is established.
5. Press .
●
Both outside parties are put on Hold.
6.
●
Unsupervised Conference is established.
1.
2. Press either of the Conference
call.
1. Establish a three-party Conference.
2.
●
Both outside lines become idle.
To later join an
Unsupervised
Conference:
To later join an
Unsupervised
Conference:
To establish an
Unsupervised
Conference:
Tandem Trunking
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