[Freeswitch-users] Registering with external SIP provider

[LuKaRo]

Hi everyone,

I'm unable to register freeswitch with an external SIP provider. I gave 
the pages on sofia on the wiki already a good read, but I can't get it 
to work. One special thing is that my machine has multiple network 
interfaces and needs to use a specific one to connect to the external 
SIP provider. Therefore, I copied "external.xml" in 
"/opt/freeswitch/conf/sip_profiles" to "my-sip.xml" and changed the 
values for "rtp-ip", "sip-ip", "ext-rtp-ip" and "ext-sip-ip" to the IP 
address of the interface freeswitch should use, and added the "my-sip" 
directory to the "<X-PRE-PROCESS cmd="include" header.

Then I created "/opt/freeswitch/conf/sip_profiles/my-sip/my-sip.xml" 
with the following contents:

<include>
   <gateway name="my-telephony">
   <param name="proxy" value="<ip address of SIP provider>"/>
   <param name="username" value="49xxxxxxxxxx"/>
   <param name="extension" value="49xxxxxxxxxx"/>
   <param name="password" value="passwordisnotneeded"/>
   <param name="register" value="true"/>
   <param name="register-transport" value="tcp"/>
   <param name="context" value="public"/>
   </gateway>
</include>

"sofia status" on the fs_cli lists the profile as "REGED":

             my-sip    profile sip:mod_sofia@<local ip address>:5060    
RUNNING (0)
      my-sip::my-sip    gateway sip:49xxxxxxxxxx@<ip address of SIP 
provider>    REGED

ss -an|grep <ip address of SIP provider> also lists two established 
TCP-connections:

tcp    ESTAB      0      0      <local ip address>:46878              
<ip address of SIP provider>:5060
tcp    ESTAB      0      0      <local ip address>:5060               
<ip address of SIP provider>:25976

However, "sofia status profile my-sip reg" shows 0 registrations:

Registrations:
=================================================================================================
Total items returned: 0
=================================================================================================

And when issuing a call from outside to the extension registered at the 
SIP provider, I just get a busy signal on the phone. Logs of the 
external SIP provider report "recipient unavailable".

Any ideas what could be wrong or how to further diagnose this issue? How 
can I check if the call reaches freeswitch?

Thanks a lot in advance,

LuKaRo