An update to this:
I have tried the following settings and corresponding results.
1. With STUN Disabled:
a) Directly connect OBI 110 to ADSL Modem: Outgoing works, Incoming - phone rings but no voice on either end
b) Connect OBI 110 to Linksys WRT54G (which is connected to ADSL Modem):
Outgoing works, Incoming - phone rings but no voice on either end
2. With STUN Enabled:
a) Directly connect OBI 110 to ADSL Modem: Outgoing works, Incoming - phone rings but no voice on either end
b) Connect OBI 110 to Linksys WRT54G (which is connected to ADSL Modem):
Outgoing works, Incoming - phone rings but no voice on either end
My SIP service is
callwithus.com.
They shared the following log. According to them SIP ALG could be the issue as the 3 ports highlighted in bold should be the same.
<<START LOG>>
Mar 11 12:51:41 west /usr/local/sbin/kamailio[744]: INFO: <script>: SIP message from udp:59.184.181.179:
50683REGISTER sip:sip.callwithus.com:5060 SIP/2.0
Call-ID: bf364af9@192.168.1.5
Content-Length: 0
CSeq: 34323 REGISTER
From: <sip:accountno@sip.callwithus.com>;tag=SP13d8c94261e5303e5
Max-Forwards: 69
To: <sip:accountno@sip.callwithus.com>
Via: SIP/2.0/UDP 59.184.181.179:
50684;branch=z9hG4bK-fc7a511;rport
Authorization: DIGEST algorithm=MD5,nonce="UT4L8lE+CsaTYiYXTkPhYHbmcijiIkX1",realm="sip.callwithus.com",response="a67fab8769a
a09c836ee80be94c59395",uri="sip:sip.callwithus.com:5060",username="accountno"
User-Agent: OBIHAI/OBi110-1.3.0.2776
Contact: <sip:accountno@59.184.181.179:
50691>;expires=60;+sip.instance="<urn:uuid:00000000-0000-0000-0000-9cadef00f002>"
Allow: ACK,BYE,CANCEL,INFO,INVITE,NOTIFY,OPTIONS,REFER
Supported: replaces
<<END LOG>>
Strange thing is I had a Grandstream HT486 before and using the same configuration and it was working great when I disabled NAT Traversal and STUN on the HT486. I replaced the Grandstream HT486 with OBi110 and now it does not work. I remember having the same issue of not hearing incoming calls on HT486 and then disabling STUN and NAT traversal to make it work.
Is there a specific setting on OBi110 to disable NAT Traversal?
Experts, please help.