call not working between two cluster

[Rakesh K]

Hi Everyone 

I am trying to make call from phone A cluster 1 to phone B cluster 2.

Call hits the Phone B and will click speaker button there is no audio and in phone A can hear call ringing tone, and the call gets disconnected after 8 seconds.

I have H.323 gateway on both clusters and no mentioned any codec on the router  

I am testing this in my lab and there is no location or region set everything is to default. The phone is using sccp 7960. 

[Carlo Poggiarelli]

Hi,

did you verify that ip routing between Phone a and phone B exists?

From IP Phone A’s subnet you should be able to ping II Phone B

Please let me know.

HTH

Regards

Carlo

[Rakesh K]

Phone A is making a call to Phone B and its ringing, I guess this says the route is there right?

[Carlo Poggiarelli]

Hi,

No.

That means that Cluster A can reach Cluster B and each Cluster can reach their own IP Phones.

Once the call is established, rtp traffic goes directly between IP Phones 

HTH

Regards

Carlo

[Rakesh K]

Hi,

I just made a ping from router 1 to phone 2 and router 2 to phone 1 and it was a success.

is there any other way you need me to check.

[Carlo Poggiarelli]

Hi,

That test could not be enough.

If Router A has an interface directly connected to IP Phone A , you can try to ping using extended ping or a ping with “source” option.

Eg.

ping 10.20.1.10 source 10.10.1.1 ( where 10.10.1.1 is the Router A ip address )

Please give it a try and let me know 

Thanks

Regards

Carlo

[Rakesh K]

The Phone which i am using a softphone

[Carlo Poggiarelli]

Are both softphones?

If yes, try to ping from the pc wher softphone A is installed on to the other IP Phone/Softphone.

Please let me know 

Thanks

Regards

Carlo

[Rakesh K]

success

[Slavik Bialik]

Is there a firewall between 2 sites? If so, maybe the RTP packets are being dropped because of a policy.

Another thing I would also do, I would take a packet capture from both sides and see what's wrong.

[Carlo Poggiarelli]

Any firewall on the pc where Softphones are installed?

[Rakesh K]

I will go to the lab and try to connect the physical phone and do a test.
Is there anything need to look for in codec configuration in router or cucm?
If even physical phone fails is there anything I need to look for?

[Carlo Poggiarelli]

Hi

When the call is established, run the following command on both gateways:

show voip rtp connection

and please post the output 

Thanks

Regards

Carlo