Multiple registrations - how is this even possible ?

[A.Takacs]

Seeing some phone registered multiple times - no quite sure what to make of it (same IP & MAC) ??



Any idea what's going on here ?

 

[Saqqara]

How are the phones provisioned ? Local / VPN / STUN / SBC

At a guess these are configured as stun

 

[A.Takacs]

"Direct SIP - STUN"

What do you have in mind ?

 

[AWS2P]

In your capture hide mac adress instead of local ips

If STUN did you set as it's requested by 3cx?

 

[Saqqara]

Have you configured them the 3CX supported way.

Given each phone as static IP (can be done via DHCP)
Assigned different SIP ports , block of RTP ports to the phone.
Setup port forwarding on the router protecting the phones - so that the correct SIP , RTP ports are forwarded to the correct phone.

For example

Ext 340 - SIP Port 5065 RTP ports 14000 - 14012
Ext 350 - SIP Port 5066 RTP ports 14013 - 14025
and so on

Another option to above, is to install SBC locally

 

[A.Takacs]

In your capture hide mac adress instead of local ips

Is there a security implication in showing our phone MAC ?

If STUN did you set as it's requested by 3cx?

Not sure what you are referring to ?

 

[A.Takacs]

Ext 340 - SIP Port 5065 RTP ports 14000 - 14012
Ext 350 - SIP Port 5066 RTP ports 14013 - 14025
and so on

Will look into this - is there some "fixed" / suggested setup for SIP vs RTP ports to use ?

 

[Saqqara]

Will look into this - is there some "fixed" / suggested setup for SIP vs RTP ports to use ?

Just each phone has to have a different sip port and a block of rtp ports (normally 12)

These settings are configured under Phone Provisioning - Local SIP Ports , Local RTP Audio Ports Start and Local RTP Audio Ports End

 

[AWS2P]

Not sure what you are referring to ?

exactly what Saqqara explain to you, which is the 3CX supported way for STUN

 

[JohnS_3CX]

Hi @A.Takacs

When all your STUN phones are coming from the same public IP (ie, they are all at the same office) and you did not set individual ports for each one, then the PBX sees multiple registrations coming from the same port+IP and hence it generates duplicates.

For proper STUN deployment, please refer to this training module for more details: https://www.3cx.com/3cxacademy/videos/intermediate/configuring-remote-extensions/