Issues with SIP Trunk - Inbound calls work about 20% of the time 3

[dsm600rr]

Hello all,

I have deployed a new SIP trunk with one of my clients and have an Inbound Test DID on their account.

When I call the test DID, it connects about 20% of the time. The other 80% I get a busy signal.

I had their firewall administrator do the following:

Lock down anything on port 5060 aside from their SIP Provider. We will need to always allow the Following Subnets and have them forwarded to their Avaya PBX:

104.219.163.0/24
104.219.162.0/24
Avaya PBX: 192.168.1.220

Also please Forward the RTP Port Range to the Avaya PBX at: 192.168.1.220

Same issue. Thoughts?


ACSS

 

[dsm600rr]

Figured I would update this a bit.

So I spoke with their Firewall Administrator and apparently their Firewall does not have a Static Public IP Address. I confirmed this by going to IP Chicken, navigating to that address and it indeed brings up their Comcast GW

What seems to be happening is port 5060 keeps opening and closing, so I modified the "Bind Refresh Time" under the "Network Topology" tab to 44 seconds and that seemed to resolve the issue.

ACSS

 

[tac84]

Nice work @dsm600rr thanks for the update/posting the resolution

Thanks, Tim
Adelaide, Australia

 

[dsm600rr]

Thank you for the Star, appreciate it.

ACSS