Checked the archives. I cannot get ADPCM to work with SIP. Calling from phone1 (adpcm) to phone 2(ulaw). Both phones Grandstreams with one set with G726-32 with v0.7.1 cvs. Has anyone got adpcm to work? Jan 24 09:00:14 WARNING[409617]: rtp.c:1069 ast_rtp_write: Not sure about sending format ADPCM packets Jan 24 09:00:14 WARNING[409617]: rtp.c:934 ast_rtp_raw_write: Not sure about timestamp format for codec format ADPCM Master