Codian ISDN3241 dropping telephone calls

[Allan]

I have an ISDN GW and when people dial in to it using telephones (5+ people) it starts making noise through the handset and drops calls. I have been using this GW for video conferencing without any issue.

The event log is filled with errors as follows
dspapi Warning DSP(05) : "ISDN semaphore count 000005fa"

Any ideas?

[val]

Hi Allan,

Have you resolved the issue? i have the same situation and I don't know if it's an operator ( ISDN PRI ) or GTW issue.

[Allan]

I updated the firmware to the latest (unavailable at the time) verson and tested again and the problem did not occur. I have not done thourgh testing thou. As a workaround i set a redirect in call manager to allow a standard phone number to divert to the internal e164 number avoiding the isdn gateway for voice connections.

I need to follow this up later as the ISDN gateway seems to be having a lot of issues with external sites and extabliching calls.