G400P: Hangup Cause 8

I am getting an intermittent problem some dropped calls through a G400P card (used for voice calls and text messages). By cunning insertion of NoOp() statements into the dialplan, I have found that ${HANGUPCAUSE} = 8 whenever this happens.

However, I am really none the wiser; the most I can discover is that Hangup Cause 8 is "Pre-empted", with no further explanation.

I wondered whether it was caused by someone trying to dial in on a line which was already in use for an outbound call, or by trying to send an outbound SMS (using a CLI command, such as `gsm send sms 1 07778429726 WIBBLE`) or even by the arrival of an inbound SMS, but I cannot disrupt an established call using any of these methods.

Can anyone help me work out what might be the problem and how to cure it?


Software versions: Debian Wheezy -- kernel 3.2.0-4-amd64 -- asterisk-1.8.22.0 -- dahdi-linux-complete-2.7.0+2.7.0 -- chan_extra-2.0.7.

Hi,

This is Rick,can you let me check it for you remotely?
Please contact me when you available,my contact info be shown as below:

E-mail:[email protected]
Skype: rick.zhu3

Best Regards.

The server is firewalled off from the public Internet, and arranging remote access is going to take some time to sort out.

Can you let me know some tests I can try in the meantime?

Hi,

Neend't let the server in the public internet,Or i can connect your PC and access the server.
If possible,we can talk with more details via Skype,please contact me via Skype.

My Skype is:rick.zhu3

Best Regards.