This was tested and worked, but fails in the real world. I have a landline that brings in FAX to a grandstream gxw4104 - which gets connected to a gxw4008 - to a modem to receive faxes via hylafax. There must be too much distortion as I'm getting lots of errors in hylafax and it finally drops the call. I have PCMU on both of the grandstream boxes so I'm thinking that freeswitch should just pass the data. Are there any other settings I might fiddle with? ,.,.,.,.,.,.,.,.,.,. This also brings up a question about echo suppression - there are places in the grandstreams for echo suppression (also in the polycom phones). Should both ends do echo cancellation or just one end? What is the best practice for setting echo cancellation? -------------------------------------------------------------------------------- Karl Schmidt EMail Karl@xtronics.com Transtronics, Inc. WEB http://secure.transtronics.com 3209 West 9th Street Ph (785) 841-3089 Lawrence, KS 66049 FAX (785) 841-0434 Ask any politician in private, It's a blast spending other peoples money. --------------------------------------------------------------------------------