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Hold down the Help Key on the IP Phone and then select the Ping on the screen of the phone. try and Ping from the Phone to the IPLA Address. If you can ping than the port 5080 and 5081 is blocked. If you cant ping than it is a routing problem

Hold down the Help Key on the IP Phone and then select the Ping on the screen of the phone. try and Ping from the Phone to the IPLA Address. If you can ping than the port 5080 and 5081 is blocked. If you cant ping than it is a routing problem

I am asking why i can't ping the IPLA card forget it the ports , I mean i can't ping the IPLA card from PC not only IP phone any PC in branch side can;t ping the IPLA IP it is not ports and routing issue

Mohammad,

Is the Gateway in the phone system correct?

Just to clarify.
The phone system is at 10.111.73.X

From that network you CAN ping the phone system?
From any other networks, you CAN NOT ping the phone system.

Routes check out fine. You can ping from any device on the network to any other device on the network regardless of the subnet? Only the phone system does not respond to ping s from outside of its local LAN?

I would triple check the subnet mask and the gateway settings on the phone system

yes , what you said is correct everything is pining from branches except the phone system doesn't response the ping so that the phone can't register to phone system

The Subnet and gateway are correct on the remote phone i did double check

But on the phone system is the Gateway correct?

Yes

From your description, I can't figure out what's happening either. There shouldn't be an issue if all the pings to other devices work but not phone system.
I know some routers could be set up not to respond to ping, but I don't think there is a configuration to turn off ping response on the phone system.

one way is to replace the phone system with your computer with the exactly same IP, try to ping from and to it. If it works well, maybe it's a phone system issue, otherwise I think it's a routing issue.
Another is to use TRACERT command to trace the path from branch to phone system.

GOOD LUCK!

wireshark?

I have one strange question

Why the remote IP phone work once we install it after that it became give SIP SERVER NOT FOUND ... What Happened ???

I need to logical analysis , because the customer not convinced it is network issue