Sony Ericsson TT4031 (SE-GM29) - Manual (Page 265)

Owner’s Manual Rev 1.0 Page 265 of 265
command with other commands based on other GSM/UMTS supplementary
services is described in the GSM/UMTS standards.
Note!_ Call Hold and MultiParty are only applicable to
teleservice 11.
It is recommended (although optional) that test command returns a list of
operations which are supported. The call number required by some
operations is denoted by “x” (e.g. +CHLD: (0,0x,1,1x,2,2x,3)).
<n> Description
... Integer type; equals to numbers entered before SEND
button in GSM 02.30 subclause 4.5.5.1
0 Releases all held calls or sets User Determined User Busy
(UDUB) for a waiting call
0X Releases a specific call X from a held multiparty call
1 Releases all active calls (if any exist) and accepts the
other (held or waiting) call
1X Releases a specific active call X
2 Places all active calls (if any exist) on hold and accepts
the other (held or waiting) call
2X Places all active calls on hold, except call X with which
communication is supported
3 Adds a held call to the conversation
4 Connects the two calls and disconnects the subscriber
from both calls (explicit call transfer)
“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 shall apply to the waiting call (i.e. not to the
held call) in conflicting situation.
Note!_ The “directory number” case shall be handled with
dial command D, and the END case with hangup
command H (or +CHUP).
16.14 AT+CLIP Call Line Identification Presentation