Inbound calls intermittent

[king1]

I have a client with an on-prem 15.5 server that uses an ISP provided appliance for call routing. I am in the process of migrating them to a hosted SIP trunk (Flowroute) and then moving them to an AWS instance for their 3cx server.

So step one was to port their number from Spectrum to Flowroute. The first number came through yesterday. I had the Flowroute SIP trunk set up like it shows in this article: https://www.3cx.com/docs/usa-sip-trunk-flowroute/

Since the port went through, most calls never make it to the PBX and users report hearing "this number has been disconnected". Every once in a while (maybe 1 in 20) will get through and the call gets routed to the correct extensions as expected.

I opened a case with 3cx and with Flowroute. 3cx support is looking at the log files and saying that the calls are never getting to the PBX. Flowroute is looking at their logs and saying it's making it through their network just fine. So this leads me to think maybe its a firewall issue? But the 3cx Firewall checker passes and I would think if a firewall was blocking 5060 for instance that the calls would never get through. Not sometimes work and sometimes not.

Any help would be most appreciated!!!

 

[nub]

I have started most ports by making a new did on the new system, making sure calls get to the new did then forwarding the porting did from the old provider to the new did, then I port as normal.

Boy that sentence structure looks awful.

old did: 5555551212
new temp did:5555551111

forward 5555551212 to 5555551111

now port as normal.



best of luck.

 

[JohnS_3CX]

"This number has been disconnected" is heard when a caller dials the number, and the callers network have not yet updated their number routing to point towards flowroute. They are probably sending the call to Spectrum and getting a bounce because that number no longer exists in their database.

If you call the number using a flowroute line however, the number should ring just fine because flowroute already routes the calls to their network for this DID