User Manual

CONNECT 9600
 send escape sequence +++
 wait for response OK
 send command ATH<cr>
 wait for response NO CARRIER
During the data call the device remains in data (on line) mode, so the escape sequence (+++)
must be issued before sending AT commands to the device.
When an incoming call is detected, the device reports an unsolicited code, which may be:
Unsolicited code
Reason
RING
The extended format of incoming call indication is disabled and a call
(voice or data) is incoming.
+CRING: VOICE
The extended format of incoming call indication is enabled and a voice
call is incoming.
+CRING: ASYNC
The extended format of incoming call indication is enabled and an
asynchronous transparent data call is incoming.
+CRING: REL ASYNC
The extended format of incoming call indication is enabled and an
asynchronous reliable (not transparent) data call is incoming.
+CRING: SYNC
The extended format of incoming call indication is enabled and a
synchronous transparent data call is incoming.
+CRING: REL SYNC
The extended format of incoming call indication is enabled and a
synchronous reliable (not transparent) data call is incoming.
To answer the call:
 send command ATA<cr>
 wait for response:
Response
Reason
Action
CONNECT 9600
The incoming call was a DATA
one and called modem is now on
line.
exchange data
ERROR
No incoming call is found, call
may have been lost
call lost
NO CARRIER
The incoming call was a DATA
one and the modem handshaking
has not been successful
check for mobile registration
and signal strength and modem
settings.