[asterisk-users] Dropped Calls on TDM400p

[Jonathan Barratt]

These are just PSTN calls, and I have set busydetect=no and callprogress=no in zapata.conf as per voip-info guidance, but problem persists.

CPU load never breaks 20, so that doesn't seem to be the problem, but it's a 1.2Ghz Athlon with 768MB RAM.

Power supply to system is clean, there's no heavy network traffic going on besides Asterisk to the phones (Aastra 480i's).

What other factors can I investigate? 

This client is so unhappy they are ready to go back to their old PBX system.

I am desperate, please help!!

Thanks in advance,
Jonathan

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