User Manual

AXELL D-CSR 3302 US VHF REPEATER
PRODUCT DESCRIPTION AND USER’S MANUAL
52 Doc PN 0034B-UM Rev. 2.1 © Axell Wireless Ltd
Problem 2a
Repeater is configured properly, and answers the incoming call, but when trying to dial the
repeater using an analogue mode, no modem handshaking is heard from the dialing
modem.
Problem 2b
When dialing the repeater, the repeater answers the incoming call, but no connection is
established, and after a while the repeater 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.
In order to change the modem string, go to the repeater command prompt. Try changing the
modem initialization string and log out to let the controller reinitialize the modem.
If problem remains, try a few different modem initialization strings. Axell Wireless has been
successful with the following modem initialization strings:
AT+CBST=71,0,1;\Q3
AT+CBST=7,0,1;\Q3
AT+CBST=0,0,1;\Q3
AT+CBST=0,0,1;\Q3
AT+CBST=7,0,3;\Q3
Please refer to the modem manual for detailed description of the modem initialization
strings.
Problem 3
It is possible to call the repeater from another GSM mobile, but not from an analogue
modem.
Solution
This problem is most likely related to the modem configuration and/or the configuration of
the IFU unit. Try to decrease the communications speed and make sure that the modem
error correction is supported by the IFU. Verify the IFU configuration to see if there are any
known problems with the modem connections.
Problem 4
When dialing the repeater, or when the repeater is dialing the Element Manager, the
connection is terminated before the handshaking is completed.
Solution
When a repeater is answering an incoming modem call, or calling up the OMC to deliver an
alarm or a report, the repeater will wait a configurable number of seconds for the call to be
established. If no communication is established within this time, the call will be hung up. If
this interval is set too low, the handshaking is terminated too fast. In the RMC, verify the
Modem Connect Time to see that it is set to at least 30 seconds.