how to make sip client direct to gateway ?

[GoogleCodeExporter]

What steps will reproduce the problem?
1.call from chrome .with sipml5 outboundproxy udp://<another gateway>:5060 
2.another gateway(below call this trunkGateway for short) is a gateway 
associate PSTN network with sip system.which is a private product
3.trunkGateway work well with a softphone client.(such as Mizuphone).but won't 
work with microSIP
4.webrtc2sip will send invite package to udp://<antoher gateway>:5060. but with 
no ack package

5.kamailio will work well.if i change runkGateway to kamailio

What is the expected output? What do you see instead?

What version of the product are you using? On what operating system?

Please provide server logs with DEBUG level equal to INFO

Please provide browser logs

Original issue reported on code.google.com by free...@gmail.com on 10 Aug 2015 at 11:15

[GoogleCodeExporter]

how to disable stun server logic and srtp while sending message from webrtc2sip 
to another gateway?

Original comment by free...@gmail.com on 11 Aug 2015 at 3:32