SIP trunk outgoing calls issue

[Akaffou Aristide Akaffou]

Hello,

I have a issue with sip trunk outgoing calls. The incoming calls work well.

I my network the path to join provider sip server is like this: phone--firewall--CUCM--CME srst router--firewall--sip server.

phone ip address: 10.19.51.X

CUCM ip address: 158.113.41.84

CME router ip address: 158.113.41.80

SIP server ip address: 172.20.254.252

You can see in attached the running configuration of the CME router and the debug ccsip messages output.

Please share your experience.

Regards,

Aristide

[Carlo Poggiarelli]

Hi Aristide.

Can you try to let your Cube to contact the provider with its real public IP and send a debug ccsip message output?

Let us know

Regards

Carlo

[Akaffou Aristide Akaffou]

Hi Carlo,

do you want me to bypass my CUCM server?

Regards,

Aristide

[Carlo Poggiarelli]

No.

Sip trunk is between your Voice Gateway and your provider.

Now you are natting your provider's IP Address.

I'm asking you to point to your provider with its real Public IP Address.

Thanks

Carlo

[Akaffou Aristide Akaffou]

Ok Carlo, I understand now, but now I want to make a direct sip trunk with a CUCM server to make a test, because I have three location which will use SIP trunk.

Regards,

Aristide

[Carlo Poggiarelli]

Can you please describe your call flow? 

Are you putting CUCM behind nat?

Carlo

[Akaffou Aristide Akaffou]

Carlo, 

finally I will use the same configuration and the call flow will the same as I describe:

phone--firewall-CUCM--CME router--firewall--Sip server.

I have new information. I can ping sip server with a CUCM but the sip server can't ping the CUCM.

Do you think it can be the issue?

Regards,

Aristide

[Carlo Poggiarelli]

Hi Aristide,

this kind of layout could lead to many issues if firewall are not correctly configured.

Because you are communicating through Voice gateway to Sip server, it should reach your VG on the source  port that it uses to register to Sip proxy.

I suggest you to investigate further on your network reachability and also to avoid to put a firewall between CUCM  and ip phones 

HTH

Regards

Carlo

[Carlo Poggiarelli]

Hi Aristide.

Please enable sip user agent on your gateway adding this:

sip-ua

retry invite 3
retry response 3
retry bye 3
retry cancel 2

After that please post another debug ccsip message 

Thanks 

Regards

Carlo

[Akaffou Aristide Akaffou]

Hi Carlo,

I put sip-ua command in configuration but always same issue.

You can see the debug in attached.

Regards,

Aristide

[Carlo Poggiarelli]

Hi Aristide,

did you check your firewall if  SIP inspection is enabled or there are some rules blocking SIP traffic?

Please let us know

Regards

Carlo

[Akaffou Aristide Akaffou]

Hi Carlo,

I will check and I will back to you.

Regards,

Aristide

[Akaffou Aristide Akaffou]

Hi Carlo,

Firewall have a diagnostic tool.

Does I have to check the traffic between the ip phone: ip address 10.19.51.75 and sip server: 172.20.254.252

or traffic between the CCME router(ip address 158.113.41.80) which establish trunk link with the sip server: 172.20.254.252

Regards,

Aristide

[NurlanED]

Hi Aristides,

Were you able to find a solution? I'm curious to know!

BR,

NURLAN 

[Maren Mahoney]

As this is a 9-year-old-post, I encourage you to create your own new post with a description of your problem, and your config and debug and we'll be happy to help.

Maren

[NurlanED]

Thanks a lot, Maren!

I'll definitely get to it when I have some free time. Your help is much appreciated!"Thank you, Maren.