T.38 support for Asterisk 1.8.17?

Help me please!

I’ve used Asterisk with spandsp 0.0.6pre21, T.38 works very fine without any additional setup.

Now i make new VM with Asterisk and same version of spandsp and same configs. Now Asterisk totally ignore T.38 :frowning: How to build CORRECTLY 1.8.17 with T.38 support and how to check if it was built with T.38 support?

Check in asterisk cli whether module spandsp is loaded and also check in sip.conf for T.38 settings are activated or not?