Situation B: The Modem Always Returns "Error" When Trying To Issue A Communication - Multi-Tech MultiModem MTCBA-C User Manual

Situation B: The modem always returns «Error» when trying to
issue a communication
If the Wireless MultiModem returns a message of error upon an attempted transmission of data or
voice signals, see the table below for possible causes and solutions.
If the modem
returns ...
error
Solutions for "error" message situations
Then ask ...
Is the modem registered
on the network?
Is the modem receiving
an incoming call or is it
already in
communication?
Does AT+CREG? return
0,1 (registered) or 0,5
(registered roaming)?
Is the selected bearer
type supported by the
called party?
Is the selected bearer
type supported by the
network?
Is the received signal
strong enough?
Is the antenna properly
connected?
19
Chapter 3 - Troubleshooting
Action
Follow
"Verifying network registration"
procedure to be sure modem is
registered on network.
End any communication using the
command.
If not, check for adequate signal strength on
network. Use AT+CSQ.
In comm. program, type AT+CMEE=1 to
view the extended error codes (see
"Interpretation ..." table below). Retry.
Be sure called party and network
support selected bearer type.
Be sure that semi-colon (";") is typed
immediately after the phone number in
the AT command. E.g., ATD######;
See "Signal Strength Verification".
See "Antenna/RF Specifications".
ATH