Configure PBX

[Heath]

I just tried to move from my current VOIP provider to 3CX. Currently my PBX is hosted at OVH. I've been doing some testing and playing around with 1 phone on 1 of the extensions and was ready to do the cutover, but ran in to issues. 1 extention has 3 separate ip phones 1 of those 3 is at a different location. All the others ip phones all are 1 extension. In all the phones I put in the proxy server and registration server the FDQN of my PBX and port 5060. And my authentication info for the respective extentions. Initially the phones worked. Now alothough they show they are connected and registered and the same on the management portal. The phones are not ringing when dialing the extensions. On 1 of the extentions when I dial some of the extensions says something call not allowed see administer. And some go through fine. I'll reboot, phones will be fine for a fee then some thing. I don't see any thing in the management console portal. In addition the 1 phone that has 3 phones on the 1 extension also has the 3cx client app. When I dial any another extension in addition to the extension ringing my other phones on that extension also ring. Again I can't find anything in the management console. Does this have anything to do with the PBX being hosted on OVH. Is there something I need to add in the webgui of the phones. I want to get moved over to 3CX but need to make sure everything is running smoothly before I do the cutover. Any help appreciated

 

[leejor]

If you have more than a couple of sets, at a remote location, behind the same router, you are more than likely to have some issues. When a remote set registers, it is seen by the PBX as PublicIP & port. So, one set,. is generally no problem, with two sets, or more, each has to be assigned a unique port number so they do not appear identical to the PBX.

That is for the signalling part.

The Voice packet ports can also be an issue, depending on your router. Some can keep them straight, and send the correct packets to the correct phone, others will just cause one way, or "no audio", issues.

The SBC is the solution to this, that is why it's there.

 

[neville]

First off, this is not supported by 3CX as far as I know so don't expect support to help with it.

Ok, this is what I have been testing today. I have 4 Yealink phones (T29G, T27G, and 2 T26P) on different ports, 5062-5065, 2 on the same extension and it is working fine including the WebClient control with the T29 & T27 without any changes to my firewall (Sonicwall). I also set one up behind a cable modem and it worked fine (Yealink T23G).

If you have iptables firewall installed on the 3CX server, you will need to allow these ports inbound. If you can, only allow them from the ip addresses at your locations. Unless you have installed it, iptables firewall is not installed by default at OVH.

Set the follow up under the extension.

Forwarding Rules:
Select accept multiple calls (This allows all phones on the extension to get calls if one is busy or even call each other)

Options:
Unselect Disallow use of extension outside the lan
At the bottom of the screen select PBX Delivers Audio (All audio will travel through the server, but this is not an issue with a good internet connection.

Phone Provisioning:
Select your phone type
Set any other provisioning options you want and save.

On the phone, set the provision URL https://FQDN:5001 to get the basic setup.

Since you cannot set the PBX to provide Stun provisioning settings, you will need to set the local SIP port to the port you want to use. I start with 5062 and increment on each phone. If a phone will be moved to another site, make sure the port number is not duplicated at that site.

Hope this makes sense. Anyone else that cares to add to this is welcome to.

Chuck