Issue with calling over Belkin wireless routers

[GoogleCodeExporter]

What steps will reproduce the problem?

i  am having issues  with calling over belkin  routers
I  I  tried to  make calls from  idoubs  mac    ,  it  registered  but  calls  
never  went through  , other side never  rang  ,  tried regular  number  as 
well as  other sip client .
Downloaded  Telephone for  mac  http://www.tlphn.com/
and  both  inbound and outbound  calls went like charm

2.  tried idoubs  on  iphone  same  result   ,  it  registered  but  didnt 
allow  to  make a  call  ,  it stayed on connecting and  than  terminated ..  
tried  3cx   and  it  worked  like charm again

3.   tried  on different  location with  a  different  belkin router
Exactly  same  results

What is the expected output? What do you see instead?
Calls  do  not  connect  , it   stays  on connecting  and terminates  without 
connecting call

What version of the product or source code revision are you using? On what
operating system?
latest compiled idoubs   on mac  lion  and  on iphone 4S  OD 6.0.1

Please provide any additional information below.

Wireshark  capture attached

Original issue reported on code.google.com by finsu.ex...@gmail.com on 5 Nov 2012 at 6:44

Attachments:

• [idoubs capture](https://storage.googleapis.com/google-code-attachments/idoubs/issue-133/comment-0/idoubs capture)