SBC - Yealink T53 provisioning other phones (Yealink T21 E2 and T23G) - Issue

[MicroTech Global LTD]

We have configured a Yealink T53 as an SBC in our office. This devcie seems to be working OK.

However, when we are then provisioning other phones (Yealink T21 E2 and T23G), they are detected OK via the SBC and appear in the 3CX Management Console in the Phones list as New Phones, but when we then try to assign an extension to them and Provisioning Method “3CX SBC (remote)” is selected, the SBC phone does not appear in the “3CX Session Border Controller” list and so cannot be selected. We can only get the phone working by selecting “Direct SIP (STUN – remote)” as the Provisioning Method.

Somehow, it has worked for only one phone (a T23G) so far, even though all the phones are on the same LAN and subnet (IPs obtained via DHCP)

Thanks

 

[Alphabetic]

Make sure your phones are on the latest supported firmware and try it again.
Download the latest IP Phone firmware for use with the 3CX

 

[MicroTech Global LTD]

Hi Thanks for getting back to us.

I have just checked all the phones and they all are running the latest firmware.

When this problem first happened that was the first thing i did was to update the Firmware on all Handsets but the problem still remains

 

[Alphabetic]

Is the T53 showing up as an SBC under the SIP Trunk tab?

 

[MicroTech Global LTD]

yes it is showing up under SIP Trunk

 

[Alphabetic]

Have you pressed on the field to show the SBC in the drop down?

 

[MicroTech Global LTD]

Hi, Please see below what we see

 

[Alphabetic]

Strange.. have you tried restarting services?

You could remove/add the SCB again and check?

 

[ivank]

Hi MicroTech Global LTD,
please make sure that the router phone's owner extension X and the new assigned extension Y have a common Group, otherwise the SBC is not accessible.

 

[MicroTech Global LTD]

Reply to

kieferschild​

Services all have been restarted and so has the server a number of times but no luck.

SBC fully removed and re-added and like i said only one T23G phone has managed to connect to SBC (Screenshot attached)

 

[MicroTech Global LTD]

Reply to

ivank​

Could you please provide more information on "please make sure that the router phone's owner extension X and the new assigned extension Y have a common Group, otherwise the SBC is not accessible."

What do you actually mean and how do i go about doing this if the extension do not have a common group.

Thank you

 

[Alphabetic]

Reply to

ivank​

Could you please provide more information on "please make sure that the router phone's owner extension X and the new assigned extension Y have a common Group, otherwise the SBC is not accessible."

What do you actually mean and how do i go about doing this if the extension do not have a common group.

Thank you

Create a new group, call it SBC and put both extensions in.

 

[MicroTech Global LTD]

Great. Thanks for the information.

New group has been created and the T53 has four different extensions which have all been added to that group and then 1 extension which was not allowing us to select the 3CX session Border Controller, but the problem is still there.

When Selecting Provisioning Method - 3CX SBC (remote)
3CX session Border Controller - still showing blank and no options to select the SBC phone

 

[ivank]

Then I'm afraid you'll have to open a support ticket so they fully investigate your case

 

[Alphabetic]

Are you logged in as system owner?

 

[MicroTech Global LTD]

Yes as the System Administrator / Owner