Fax detect with SIP

When I was running the 1.2 I had NVFaxDetect and it worked great, I would set the dialplan to answer the call, then send 1 ring tone (5 seconds) to the caller while I tried to detect fax tones. Now in the 1.4.8 tree I can not get NVFaxDetect to work, which is fine if I can use the built in code in the dsp.c, but as far as I know only chan_zap.c uses that fax detect code (as of 1.2 tree).

My question: Is there a way to do SIP fax detection in 1.4.8 by default now? Or has someone updated NVFaxDetect for the 1.4.8 tree?