Add Fax [t.38 Send only] to Asterisk

Running Asterisk 16. I want to send a fax over a pjsip channel using t.38. I believe I already have the capability to create a tiff of the correct form and I plan to simply scp it onto the Asterisk server. From what I’ve been able to glean I should only require two libraries, spandsp and libtiff. I think [but not positive-I’ll accept guidance] setting the endpoint config for t.38 in pjsip.conf is straightforward but I haven’t found definitive information on how to put together the config file(s) necessary for spandsp. Any help appreciated because I no longer have a POTS line.