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 remote site with 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 with TNA I get significant packet loss when it tests 2048 blocks (the 512 and 1024 blks are usually OK) and when I load test it will show Failure at about once every 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 to the Teleworker with no problems I run that on a wireless connection to my cable broadband).Interestingly enough, the 6 phone 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