AT Commands Set

SIM5215_SIM5216 AT Command Manual
4.11 ATH Disconnect existing call
Description
The command is used to disconnect existing voice call. Before using ATH command to hang up a
voice call, it must set AT+CVHU=0. Otherwise, ATH command will be ignored and “OK” response
is given only.
The command is also used to disconnect CSD or PS data call, and in this case it doesn’t depend on
the value of AT+CVHU.
SIM PIN References
NO V.25ter
Syntax
Execution Command
ATH
Responses
If AT+CVHU=0:
VOICE CALL: END:
OK
OK
Defined values
Voice call connection time:
Format – HHMMSS (HH: hour, MM: minute, SS: second)
Examples
AT+CVHU=0
OK
ATH
VOICE CALL:END:000017
OK
4.12 AT+CHUP Hang up call
Description
The command is used to cancel voice calls. If there is no call, it will do nothing but OK response is
given. After running AT+CHUP, multiple “VOICE CALL END: ” may be reported which relies on
how many calls exist before calling this command.
SIM PIN References
NO 3GPP TS 27.007
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1/13/2011