Been playing with G.722 in Asterisk 1.4.24.1 - using the back-ported patches from http://carlton.oriley.net/drupal/node/12 Works just fine as far as I can tell - Grandstream phones anyway - playing the G722 sound files, and calls between them. Transcoding seems fine too - calling non G722 devices, it seems to "just work" However Phone A (g722) calls phone B (gsm). Works fine. Phone A puts B on hold. B hears hold music. Same call setup, but phone B puts A on hold. Now, A hears the hold music, but it every 0.5 seconds there is a "blip" and it sounds like it's playing at double speed. I hear the same when calling someone via an IAX trunk which is transcoding to ulaw... My test box is using dahdi-dummy for timing - the remote IAX box has a TDM card in it. Saw this at one point on the console too: [May 8 10:56:29] WARNING[14662]: format_pcm.c:153 pcm_seek: offset too large 1209280, truncating to 969666 So I'm wondering if the patch is not that clever when applied to 1.4, or if there really is something amis? Or should I just jump to 1.6! Cheers, Gordon