Specifications

AT Command Set for L55 Platform 2003-11-21

2.3.3.4 AT+CHLD

AT+CHLD

Call hold and multiparty

Test command

AT+CHLD=?

Response

+CHLD: (list of supported <n>s)

OK/ERROR/+CME ERROR

Write command

AT+CHLD=[<n>]

Parameter

<n>

Terminates all held calls or sets UDUB (User

Determined User Busy) for a waiting call

1 Terminates all active calls (if there are any) and accepts

the other call (waiting call or held call)

1<x> Terminates call number <x> (x= 1-7)

2 Puts all active calls on hold (if there are any) and

accepts the other call (waiting call or held call) as active

2<x> Puts all active calls except call X (X= 1-7) on hold (split

3 Connects the call put on hold to the active call

multiparty

4 Call transfer

In conflict situations, the action is always applied to the waiting call.

For terminating: Use the ”AT+CHUP” command to terminate all calls except

waiting calls

Note:

The scope of this command depends on the SIM clearing

and/or on the network support

Response

OK/ERROR/+CME ERROR