SIP Congestion

[ranjithvkumar]

Hello experts,

I am having interface with service provider via SIP. so when i dialing the external number (eg., mobile number) trunks occupied but i am getting "CONGESTION" error on IP 4028 phone. I am using OXE R10.1 and i have attached my level 3 traces.

Kindly please help me on this.

[cavagnaro]

You are sending INVITE but no answer from other side...so verify with provider or your config

[haroun]

[display_ipc_out] ------------ Begin ---------------
Fri Feb 13 10:24:53 2015 Id : -1
Fri Feb 13 10:24:53 2015 REQUEST FAILURE
Fri Feb 13 10:24:53 2015 xx : 8
Fri Feb 13 10:24:53 2015 RELATIVE REQUEST : INVITE
Fri Feb 13 10:24:53 2015 [display_ipc_out] ------------- End ----------------


a few line before:ri Feb 13 10:24:53 2015 1182[CMotorCall::chooseBestResponse] last iResponseCode=408.
Fri Feb 13 10:24:53 2015 1182[CMotorCall::processResponse] no response found.
no response at time to your invite
from sip codes : 408 - Request Timeout
ask stc why ?

[ranjithvkumar]

Service provider (STC) they said that my server is not responding. They don't have any authentication or restriction from their side it seems. They are asking to check my SIP server. But my server configurations are fine.

I am suspecting it may be due to firewall in my network. Any one know what are the parameters we need to enable in firewall? and do i need to do NAT between my SIP sever to Service provider (STC) SIP server ? or NAT only between my firewall & Service provider (STC) SIP server?

Thanks.

[alex]

INVITE sip:0547126025@10.200.7.157;user=phone SIP/2.0

Are you sure your VoIP-provider is using private IP-addressing (10.x.x.x) for SIP trunks access?

[ranjithvkumar]

Hi Alex,

Yes 10.200.7.157/30 is my service provider SIP server IP. This is confirm.

[alex]

Then check IP-routing between 10.200.7.157/30 and your CPU.

[cavagnaro]

Port 5060?
Can you telnet that port?

[ranjithvkumar]

Yes the Port is open.

[cavagnaro]

Well if you can do all from that POV on OXE then you need to investigate with them. As OXE shows, other party doesn't answer back.