User guide

Developers guidelines | AT commands
114 June 2010
1X Releases the specific active call X
2 Places all active calls on hold and accepts the other
(held or waiting) call
2X Places all active calls, except call X, on hold
3 Adds a held call to the conversation
4 Connects two calls and disconnects the subscriber
from both calls
Note: “X” is the numbering (starting with 1) of the call given by the sequence of
setting up or receiving the calls (active, held or waiting) as seen by the
served subscriber. Calls hold their number until they are released. New
calls take the lowest available number. Where both a held and a waiting
call exists, the above procedures will apply to the waiting call (that is, not
to the held call) in conflicting situation.
The “directory number” case will be handled with dial command D and the
END case with hangup command H (or +CHUP).
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