Impossible to run over 7 calls on SIP Trunk over VPN
We have a VoIP SIP Trunk between a Cisco 2611XM and Cisco 2811 connected using IPsec tunnel. Using G729 codec in a 512 kbps link, we can run 5 to 6 simultaneous calls. Increasing to 7 calls bring all connected calls to crash, whereas we see that BW used doesn't overpass 350 kbps. Your help will be apreciated. Thx
Re: Impossible to run over 7 calls on SIP Trunk over VPN
the AIM will not compress anything, but the 2611 doing IPsec encryption in software, may become quite busy. check CPU usage, also there is an encryption alg. that is better for software encryption, search for SEAL on CCO.
Also, how do you know that you have true 512 bandwidth across the internet ?
In any case try using a non-encrypted GRE tunnell and see how it goes.
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