Cannot find a new phone in the management console

[Draven.Li]

In the past, the new phone can be seen in the management console after the phone is connected to the network, but now there is no way to see it.

Phone； Fanvill X3GS
Version: 18.0.237

 

[Saqqara]

Have you factory defaulted the phone ?

Is the phone on the same network as 3cx server ?

 

[JohnS_3CX]

Hello,

Check the blacklist and ensure the phone has not been blacklisted (it will not appear in phones in this case).
Then, factory reset the phone and allow it to appear in bold in your phones section.
Assuming this is a LAN or SBC based installation, it should show up.

You can plug it into an existing cable of an already working phone, just to make sure you have a network connection. If you use VLANs or any other special network setup, that part is up to you to troubleshoot. The phone sends a multicast message on the network which needs to reach your SBC or PBX. If this fails, it will never show up.

PS: Ensure you have the correct firmware first from here

 

[Draven.Li]

Have you factory defaulted the phone ?

Is the phone on the same network as 3cx server ?

Yes, a completely new phone.
Then they are all used in the company’s local area network,but not the same Vlan, maybe need to check.

 

[Draven.Li]

Hello,

Check the blacklist and ensure the phone has not been blacklisted (it will not appear in phones in this case).
Then, factory reset the phone and allow it to appear in bold in your phones section.
Assuming this is a LAN or SBC based installation, it should show up.

You can plug it into an existing cable of an already working phone, just to make sure you have a network connection. If you use VLANs or any other special network setup, that part is up to you to troubleshoot. The phone sends a multicast message on the network which needs to reach your SBC or PBX. If this fails, it will never show up.

PS: Ensure you have the correct firmware first from here

OK, thanks！
I will try , it may be a DNS or Vlan problem.

 

[Saqqara]

If the phones are a different vlan to the 3cx server pnp traffic does not normally pass thru vlans, so the phones will not appear in the console

https://www.3cx.com/docs/plug-and-play-ip-phone/

If the phones should be on the same vlan as 3cx, how are you configuring the vlan, ? Does the phone get the same IP address range as the 3cx server

I

 

[Draven.Li]

If the phones are a different vlan to the 3cx server pnp traffic does not normally pass thru vlans, so the phones will not appear in the console

https://www.3cx.com/docs/plug-and-play-ip-phone/

If the phones should be on the same vlan as 3cx, how are you configuring the vlan, ? Does the phone get the same IP address range as the 3cx server

I

Very strange.The IP of the phone is 110.112.52.194, and server is 10.112.1.1, the subnet mask is 255.255.0.0.
I tested that they can communicate with each other, but the phone just doesn't appear in the console.
It can be found normally before, and only the DNS server has been modified recently, no other changes have been made.

 

[Saqqara]

IP address range 110.112.52.194 is not part of the network rfc 1918, , you should not be using this range for internal networks . You need to change the network setup to use rfc 1918 IP address ranges

https://www.dummies.com/programming/networking/private-ip-address-ranges-for-networks/

https://netbeez.net/blog/rfc1918/

3cx will only detect internal phones on the rfc 1918 address ranges

Dns changes will not affect vlan settings

 

[Draven.Li]

IP address range 110.112.52.194 is not part of the network rfc 1918, , you should not be using this range for internal networks . You need to change the network setup to use rfc 1918 IP address ranges

https://www.dummies.com/programming/networking/private-ip-address-ranges-for-networks/

https://netbeez.net/blog/rfc1918/

3cx will only detect internal phones on the rfc 1918 address ranges

Dns changes will not affect vlan settings

But I haven't changed any settings recently, except for upgrading to V18, then it suddenly can't appear.

 

[JohnS_3CX]

Very strange.The IP of the phone is 110.112.52.194, and server is 10.112.1.1, the subnet mask is 255.255.0.0.

You said it yourself, this is very strange. And currently we know that your phone is outside of the RFC1918 address space so it is justified that a problem exists.

You need to find out how it ended up with such an IP, and make sure it is brought back to the correct range.

 

[Saqqara]

There was a fixed where you modify the settings, that was not supported to allow non RFC118 networks.

As above you should change your network IP addresses range to conform to RFC118

 

[Draven.Li]

You said it yourself, this is very strange. And currently we know that your phone is outside of the RFC1918 address space so it is justified that a problem exists.

You need to find out how it ended up with such an IP, and make sure it is brought back to the correct range.

Maybe I need to find a suitable time to modify, and then test it.. Thanks for your advice.

 

[Draven.Li]

There was a fixed where you modify the settings, that was not supported to allow non RFC118 networks.

As above you should change your network IP addresses range to conform to RFC118

Maybe i need to try. Thank you for your help!