no incoming call voip phones, out going calls are good

markc56
markc56 used Ask the Experts™
on
Just started new job. Phones are VOIP (Cisco UC500, Cisco 7975, NexVortex). Phones were recently wiped clean and setup again. Outgoing calls are good. The incoming calls are falling
over to the emergency backup line. Is this a system setting in CCA? Or on NexVortex's end?
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Commented:
What and with which ports you have done something?
What protocol you are using?

Author

Commented:
It is pretty much open at this point.  Sit to default with the CCA and basic user setup. No other setup except for basic provider number and user phone ids.

Commented:
If you are using sip voip calls, the ports that are used are:
1 usuallly 5060 for sip packets
2 ports for voice
3 ports for video

If you are behind NAT or some security gateway these ports should be opened for usage
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Commented:
5060 is already in the access list by default. vlan 100 create for voice by default and ports added to access list too.
Commented:
Usually such problem appears when there is a NAT problem. Not all ways the same ports for voip are used. If the call is outgouing the voip ports in nat usually opens correctly. But there is a problem with incoming trafing for the incoming calls. Do you using NAT. Maybe some port forwarding issues exists too.

Author

Commented:
By time I returned, the system had already been reloaded with a backup configuration that was a year old (most recent) and calls are now working. I too, believe it was pointing to a NAT issue, but no way of finding now.  I do know that is that last time that a backup configuration will go longer than one week. Thanks!

Author

Commented:
Only rated good because there is no way to find the actual reason at this point, but I believe the response was definitely on the right track.

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