IP-based TWT GNR configuration problem without authentication

[Lorenzo Belpoliti]

Buongiorno, non riesco a configurare correttamente un trunk GNR (selezione passante) di TWT (Italia) basato su IP senza autenticazione. qualcuno potrebbe gentilmente aiutarmi con i parametri di configurazione nella centrale? grazie

Hello, I can't correctly configure a TWT (Italy) IP based GNR trunk (pass-through selection) without authentication. could someone kindly help me with the configuration parameters in the control panel? thank you

 

[YiannisH_3CX]

Hi @Lorenzo Belpoliti

Did you follow our guide to set up TWT? If so what issues are you having exactly?

 

[Lorenzo Belpoliti]

I followed this guide

https://www.3cx.com/docs/italian-sip-trunk-twt/

being an IP registration without authentication I still see the green LED in the sip trunk menu of the pbx without certainty of "registration ok" the fact is that the extension to which I have associated the DID does not receive calls and makes phone calls .. after 20 second, the extension emits a no-line sound. the switchboard log: Call or Registration to XXXXXXXXXX @ (Ln.10001@TWT) has failed. 0.0.0.0 replied: 408 Request Timeout; internal

 

[YiannisH_3CX]

Did you whitelist your IP address with TWT? You are correct that IP based trunks are always shown as green as they do not require registration.
So make sure that TWT has your correct public IP address whitelisted and that your outbound rules are configured correctly. From the error I assume that the PBX is trying to make the call but its getting no reply.

Also make sure that you pass the firewall checker test to avoid any issues there.

 

[Lorenzo Belpoliti]

firewall in the cloud I entered accept the ip of twt

security \ blacklist in the pbx I entered accept the ip of twt

I release my public ip of the pbx to twt

associated with did to internal xxx \ created group YYY and inserted inside internal xxx \ created outbound rule by inserting group YYY \ route 1 TWT

the pbx calls \ twt receives \ twt replies \ twt times out
moral to both me and twt the log writes time out

the twt log:
12: 53: 57.989, sip: [email protected], sip: [email protected], 3507 ,, 61, 13 apr 2022, XXX.XXX.XXX.XXX, XXX.XXX .XXX.XXX, STANDARD CALL, TIMEOUT EXPIRED,

firewall test completed successfully, all green

ps. a question: the configuration parameters of the trunk must be as default? example: sip trunk \ options \ avazate

 

[YiannisH_3CX]

ps. a question: the configuration parameters of the trunk must be as default? example: sip trunk \ options \ avazate

As you can see in the guide for TWT you need to input the TWT IP address and your numbers. Nothing else.

So let me ask you a question. If you call your TWT number from your mobile phone does the call reach the PBX? Do you see the call in the 3CX logs?

 

[Lorenzo Belpoliti]

nothing ..
neither the main trunk nor the GNR (pass-through selection)
with other Italian operators for example: Messagenet, CloudItalia, Irideos
no problem, everything works perfectly

#attention#
(these operators mentioned above, however, have registration with login)

 

[YiannisH_3CX]

In that case you need to speak with TWT since the trunk seems not to be working at all. TWT can also provide you with a SIP registration trunk. You can find instructions on how to set that up in the user guide.