User Manual

Table Of Contents
Optical Master Unit
PRODUCT DESCRIPTION AND USER’S MANUAL
© Axell Wireless Ltd A1829300 rev H 81 (86)
Documentation of +CSQ command from a modem’s manual.
In the example the reply to AT+CSQ is
0,7 meaning 7*2 dB above -113 dBm;
the modem detects a signal level of -99
dBm.
Problem 2a
OMU is configured properly, and answers the incoming call, but when trying to dial the OMU using an
analogue mode, no modem handshaking is heard from the dialling modem.
Problem 2b
When dialling the OMU, the OMU answers the incoming call, but no connection is established, and after a
while the OMU disconnects the call.
Solution
The most common cause is that the number called is the voice number of the SIM, not the data number.
Therefore, make sure to dial the data number.
If data call is used, the problem probably is an illegal modem initialization string.