Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 58 Ver. 1.00 – 10/29/2008
2.1.3.12. AT+CHLD Call Hold and Multiparty
Command Function This command controls the supplementary
services Call Hold, MultiParty and Explicit
Call
Transfer. Calls can be put on hold,
recovered, released, added to conversation
and transferred.
Command Functional Supplementary Services
Group
Command Format Query AT+CHLD=?
Response +CHLD: (0, 1, 1x, 2, 2x, 3, 4)
OK
Write Format N/A
Response N/A
Read Format N/A
Response N/A
Execution Format AT+CHLD=<n>
Response OK