Sony Ericsson GM47 - Manual (Page 324)

GM47/GM48 INTEGRATOR’S MANUAL
324
LZT 123 7263 R1C
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)).
“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).
<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)