Help Please!! MBG/Teleworker no audio

[BlackSunshine]

I have contacted Mitel Support but the will not help me since it is one the outside world network.  I Have MBG 9.2 set up on 3300 MiVoice 7.2 SP1 PR1.  MBG is in the DMZ.  I currently using MBG also for SIP Trunks which are working fine.  However when I connect phone to MBG from outside world via a router...I get no audio either way when a call is placed.  I check the alarms on MBG and I get an alarm for one-way audio from that phones MAC address.   Here is the catch ...if I eliminate the router on the outside world and connect the broadband/DSL directly to Mitel phone via a POE brick... it works great.   I understand it must be a firewall issue on the outside world router but why?  Isnt it suppose to tunnel through using TCP ports 6801 6802?  I have used the Teleworker Network Analyzer with and without a router on the outside and I get same ports being open/closed.  I greatly appreciate any help.

[dilkie]

the audio doesn't tunnel on 6801/6802, those ports are for signaling. The audio, rtp, stream will normally work *if* you have teleworker licenses to turn on the NAT bypass feature. Do you see any alarms for license failures?

Otherwise, your router is badly behaved, what model is it?

[BlackSunshine]

I've tested with several different routers and locations...different broadband and networks....same no matter where I go.  If it was a license issue it seems it wouldn't connect without a router on the outside

[dilkie]

definately strange... privately send me the /var/log/tug/tug.log file after you make a test call and I'll take a look.

[BlackSunshine]

Fixed this issue.  Mitel MBG Engineering guidelines says to open UDP RTP ports 20000-31000..... these ports were open... Checked firewall and for some reason RTP traffic was coming in TCP RTP ports 20000-31000 which was blocked on firewall.  Open RTP ports 20000-31000 UDP and TCP...works now