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Routine Loss of Connectivity with VoIP phones

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RGAIT

Technical User
Sep 21, 2011
2
US
Pardon me if it seems like this question is in the wrong forum, I am puzzled by a problem and need some outside of the box advice.
I'm running a SRW 208p Linksys Cisco 2gig switch with 6 VoIP phones (Mitel 5312) and 6 PCs thru a Sonicwall Firewall across a WiMax 3meg connection. My connectivty on the WiMax is great and I rarely even begin to use up the bandwidth.My IP phones consistently lose connectivity and drop calls, reboot themselves etc. My WiMax carrier tests clean and we have matched settings on the firewall. When I test the Teleworker connection( a server in house) I get significant packet loss when it tests 2048 blocks and when I load test it will show failure at about once a minute.

Telecom Vendor,WiMax provider and IT are stumped for something new to try. I have another IP phone from another location ( my home actually) that goes the same route with no problems.

Interestingly enough, this arrangement went into operation in May and until 3 weeks ago ran quite nicely. Then it started to get flaky and progressed to where its becoming unusable. Ilm looking for ideas/pathways to follow to define the cause of this. Any ideas please? many thanks
 
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