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Full Version: T23G - "Unknown URI Scheme"
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Hi everyone,

We're currently testing a few SIP phones out but were having issues with the T23G even establishing a connection with FreePBX.

However, using the same settings in the T26, everything connects and the FreePBX CLI shows the connection.

I know this is very vague information, but does anyone have any ideas?

Thank you
Hi ,
Do you mean when you testing T23 , It can registered successfully but when make a call, the phone UI shows “ Unknown URI Scheme“ but if you add the same account information to T26, it can work well?
if yes, would you please share us config.bin file, level 6 syslog and pcap trace for both T23 and T26 that we can check ?
you can refer to below link for how to catch these information
you can send them to
Best Regards!
I cannot register the T23G on Freepbx and I also get this "Unknown URI Scheme" message, was this resolved, if so, how?
Never mind, I was locked out of freepbx via fail2ban, resolved. Once i unlocked the IP, it worked.

But check this other thread out "What's the VPN problem with the T23G ??" I must be doing something wrong...
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