AT Commands Phone Terminal Terminated
40
4.11.2 Unsolicited result codes
+CRING
Call Mode Indication
4.11.3 Use scenarios
Mode Change and Call Hang-up
This scenario shows the following steps:
• Set call mode to voice/data
• Enable cellular result code indication
• Switch from voice to fax and answer fax call
• Hang up fax call
Description:
When enabled by using
, an incoming call is indicated with +CRING
instead of
Unsolicited result code:+CRING:
<type>
Parameter:
<type>:
<type>
Description
ASYNC
Asynchronous transparent
SYNC
Synchronous transparent
REL ASYNC
Asynchronous non-transparent
FAX
Facsimile
VOICE
Normal voice
VOICE/XXX
Voice followed by data (‘XXX’ is SYNC, ASYNC, REL
ASYNC, or REL SYNC)
ALT VOICE/XXX
Alternating voice/data; voice first
ALT XXX/VOICE
Alternating voice/data; data first
ALT VOICE/FAX
Alternating voice/fax; voice first
ALT FAX/VOICE
Alternating voice/fax; fax first
AT command
Response
Phone mode
Comment
AT+CMOD?
+CMOD: 0
OK
Single mode enabled
AT+CMOD=1
Change to alternating voice/
fax
OK
AT+CRC=1
Extended format enabled
OK
+CRING: ALT
VOICE/FAX
Voice call
Voice call followed by fax call
indication
ATA
Voice call
Switch to fax call