Quote:
Originally Posted by Cyberian75
Calls through Voxalot often are only one-way audio. Direct calls to my VSPs are okay. Symmetric NAT is off, and I'm using proxy failovers on an SPA-3000. Any thoughts?
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Cyberian75,
Are you still experiencing one way audio when using one of the US servers? If so try the following steps.
Turn on "Symmetric NAT Handling" in your Voxalot account.
In your SPA-3000
1. set NAT Mapping Enable: no - (this is signals Voxalot to engage it's "Symmetric NAT Handling" function, otherwise Voxalot will not use "Symmetric NAT Handling" even if you have enabled it)
2. set Use DNS SRV: no
3. set Proxy: proxy01.us1.voxalot.com
4. set Outbound Proxy: proxy01.us1.voxalot.com
5. change "SIP Port:" to a different port (otherwise your ATA may accept an incoming call from the previous proxy until registration has expired, that could be up to 1 hour)
6. set Use Outbound Proxy: yes
7. set Use OB Proxy In Dialog: yes
In your router you may have to disable
ALG as this function may re-enable NAT Mapping within the SIP packets, thereby disabling Voxalot's "Symmetric NAT Handling".