LE910Cx AT Commands Reference Guide
80502ST10950A Rev. 14 Page 388 of 1904 2022-03-04
adds an held call to the conversation
connects the two calls and disconnects the subscriber
from both calls (Explicit Call Transfer (ECT))
"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 exist, the above procedures
apply to the waiting call (i.e. not to the held call) in conflicting
situation.
The command is only applicable to voice calls.
For VoLTE,
11. conference call <n>=2X and <n>=4 parameter not supported.
12. while no active or held calls option <n>=3 starts conference
call to conference server without participants.
AT+CHLD=?
Test command returns the list of supported values of parameter <n>.
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