Data Channel Troubleshooting
Last updated: January 16, 2009
This section is only applicable to the lab application.
GPRS Attach
GPRS attach is a UE initiated procedure. There are three errors conditions during GPRS attach that will generate error messages. These error conditions will not stop the GPRS attach procedure:
-
The test set does not receive the RRC Connection Complete message from the UE within 6 seconds from the time of sending the RRC Connection Setup message. This will generate error +201, No Response to RRC Connection Setup.
-
The test set does not receive the Identity Response message from the UE within 6 seconds from the time of sending the Identity Request message. This will generate error +208, No Response to Identity Request.
-
The test set does not receive the RRC Connection Release Complete message from the UE within 6 seconds from the time of sending the RRC Connection Release message. This will generate error +208, No Response to RRC Connection Release.
Ping
-
If your data channel application does not seem to be working, try pinging the device. The test set has a ping feature, and so do most computer operating systems. See
Ping
for more information.
-
Ping log has an unknown IP address: If you log a Ping that originated from the test set, the Ping Downlink Source Address and the Uplink Destination Address have a fixed value of 0x821DB5CB. This is because the test set uses an internal address to originate IP data from the test set to the mobile station.
-
Ping does not work although the mobile station is attached: The device must be PDP activated. This may require that you initiate a data transfer from the mobile station. Also, Ping and Data Channel are only available in when the connection type is set to
Auto
.
Frequently Asked Questions
-
Can't find where to set the mobile station address: Switch the
Conn Type
to
Auto
first.
-
BER measurements wrong when using the data channel: The BER measurement is not supported during data connections.
-
What is the APN (Access Point Name) that I need to include with the dial string when using dial-up? No APN is needed.
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