All,
Racking my brain on this one and not getting anywhere.
I have a large CUCM instance that we will be doing a slow migration to 3CX (assuming we can get this to work), but will need interoperability with the old system unbtil we are fully migrated.
The problem: I can start a call, and answer the call, however no audio comes across in either direction. I believe I had it working a while ago in V18, but since V20 I have had a lot of trouble getting it back to that state. I have wiped the old setup since though, so I could still be missing something
Steps to setup:
1. I have setup a Trunk in 3CX, direct IP, and ajusted just about every setting I can find.
2. In CUCM, I havea custom SIP profile and trunk configured with the correct ports.
And the trunk itself
3. I can see traffic from CUCM to 3CX, but nothing returning from 3CX, below is a TCPdump of a call with traffic originating from CUCM to 3CX. I have also have packet captures, but it has some real IPs and numbers, so can send via DM if needed
I have verified:
1. There is no firewall at all between these, direct routing
2. DNS records work correctly between both systems
3 Routing is working correctly. I can see calls ringing from 3CX to CUCM and phone rings when calling from CUCM to 3CX
4. I get middec call notifications when dialing either way
5. *777 works in 3CX, and the old CUCM system works as intended too
Kidna at a dead end here if anyone knows how to solve this.
Racking my brain on this one and not getting anywhere.
I have a large CUCM instance that we will be doing a slow migration to 3CX (assuming we can get this to work), but will need interoperability with the old system unbtil we are fully migrated.
The problem: I can start a call, and answer the call, however no audio comes across in either direction. I believe I had it working a while ago in V18, but since V20 I have had a lot of trouble getting it back to that state. I have wiped the old setup since though, so I could still be missing something
Steps to setup:
1. I have setup a Trunk in 3CX, direct IP, and ajusted just about every setting I can find.
2. In CUCM, I havea custom SIP profile and trunk configured with the correct ports.
And the trunk itself
3. I can see traffic from CUCM to 3CX, but nothing returning from 3CX, below is a TCPdump of a call with traffic originating from CUCM to 3CX. I have also have packet captures, but it has some real IPs and numbers, so can send via DM if needed
Code:
21:27:31.640677 IP FQDN.of.mydomain.com.37028 > 10.X.X.X.53XXX: Flags [P.], seq 2414:3646, ack 22899, win 501, options [nop,nop,TS val 16272193 ecr 4003588196], length 1232
21:27:31.640705 IP 10.X.X.X.53XXX > FQDN.of.mydomain.com.37028: Flags [.], ack 3646, win 501, options [nop,nop,TS val 4003615222 ecr 16272193], length 0
21:27:31.721004 IP 10.X.X.X.53XXX > FQDN.of.mydomain.com.37028: Flags [P.], seq 22899:23206, ack 3646, win 501, options [nop,nop,TS val 4003615303 ecr 16272193], length 307
21:27:31.761193 IP FQDN.of.mydomain.com.37028 > 10.X.X.X.53XXX: Flags [.], ack 23206, win 501, options [nop,nop,TS val 16272314 ecr 4003615303], length 0
21:27:31.761204 IP 10.X.X.X.53XXX > FQDN.of.mydomain.com.37028: Flags [P.], seq 23206:23605, ack 3646, win 501, options [nop,nop,TS val 4003615343 ecr 16272314], length 399
21:27:31.761362 IP FQDN.of.mydomain.com.37028 > 10.X.X.X.53XXX: Flags [.], ack 23605, win 501, options [nop,nop,TS val 16272314 ecr 4003615343], length 0
21:27:31.811039 IP 10.X.X.X.53XXX > FQDN.of.mydomain.com.37028: Flags [P.], seq 23605:24754, ack 3646, win 501, options [nop,nop,TS val 4003615393 ecr 16272314], length 1149
21:27:31.811220 IP FQDN.of.mydomain.com.37028 > 10.X.X.X.53XXX: Flags [.], ack 24754, win 501, options [nop,nop,TS val 16272364 ecr 4003615393], length 0
21:27:31.838256 IP FQDN.of.mydomain.com.sip > 10.X.X.X.sip: SIP: ACK sip:[email protected] SIP/2.0
21:27:31.856947 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:31.856982 IP FQDN.of.mydomain.com.24675 > 10.X.X.X.7079: UDP, length 56
21:27:31.877048 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
... many of these
21:27:32.276942 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:32.296932 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:32.316927 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:32.322485 IP 10.X.X.X.53XXX > FQDN.of.mydomain.com.37028: Flags [P.], seq 24754:25903, ack 3646, win 501, options [nop,nop,TS val 4003615904 ecr 16272364], length 1149
21:27:32.322656 IP FQDN.of.mydomain.com.37028 > 10.X.X.X.53XXX: Flags [.], ack 25903, win 501, options [nop,nop,TS val 16272875 ecr 4003615904], length 0
21:27:32.323847 IP FQDN.of.mydomain.com.sip > 10.X.X.X.sip: SIP: ACK sip:[email protected] SIP/2.0
21:27:32.336945 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:32.356906 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:32.377930 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:32.396935 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
... many of these
21:27:32.416929 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:33.316928 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:33.336917 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:33.351138 IP 10.X.X.X.53XXX > FQDN.of.mydomain.com.37028: Flags [P.], seq 25903:27052, ack 3646, win 501, options [nop,nop,TS val 4003616933 ecr 16272875], length 1149
21:27:33.351314 IP FQDN.of.mydomain.com.37028 > 10.X.X.X.53XXX: Flags [.], ack 27052, win 501, options [nop,nop,TS val 16273904 ecr 4003616933], length 0
21:27:33.352650 IP FQDN.of.mydomain.com.sip > 10.X.X.X.sip: SIP: ACK sip:[email protected] SIP/2.0
21:27:33.356929 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:33.376901 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:33.396931 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
... many of these
21:27:34.676901 IP FQDN.of.mydomain.com.24674 > 10.X.X.X.7078: UDP, length 32
21:27:34.693082 IP FQDN.of.mydomain.com.sip > 10.X.X.X.sip: SIP: BYE sip:[email protected] SIP/2.0
21:27:35.209008 IP FQDN.of.mydomain.com.sip > 10.X.X.X.sip: SIP: BYE sip:[email protected] SIP/2.0I have verified:
1. There is no firewall at all between these, direct routing
2. DNS records work correctly between both systems
3 Routing is working correctly. I can see calls ringing from 3CX to CUCM and phone rings when calling from CUCM to 3CX
4. I get middec call notifications when dialing either way
5. *777 works in 3CX, and the old CUCM system works as intended too
Kidna at a dead end here if anyone knows how to solve this.
