UniMod GSM-4
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7.1
Testing the Connection
For easier diagnosis of connection problems it is possible to display ex-
tended result codes for incoming call indication. In order to do this the fol-
lowing steps are necessary:
Activate result codes: Enter „ATQ0“, Modem reply: OK.
Activate extende
d result codes: „AT+CRC=1“, Modem reply: OK.
(„AT+CRC=0“ switches the extended codes off)
Call UniMod GSM-4 via data service (use appropriate telephone number).
Watch incoming call using terminal program.
Possible messages:
+CRING: REL ASYNC
incoming call
has been correctly transmitted. That’s OK.
+CRING: VOICE
incoming call has been transmitted via „voice“ mode. Call rejected by mo-
dem. Remedy: set SIM-Card
“Voice / Prepaid”:
+CRING: FAX
incoming call has been transmitted via „fax“ mode. Call rejected by modem.
7.2
Parity Error (7E1)
Depending on certain circumstances (software configuration, hardware
configuration of the PC, connection of the modem to the PC, operating sys-
tem,...) the communication software of your application might issue a mes-
sage like: wrong parity. In the most cases a switch of the UniMod GSM-4
data format from "7E1" to "8N1" is able to bring fast and easy help. Using
this configuration data retrieval from most meters is possible in the format
"7E1" and "8N1".
When data format „7E1“ is used the correct parity can be transmitted auto-
matically (Set tick
) or not (Setting
) .
If there are any further questions we are happy to help you.
