On 01/13/2010 02:20 AM, Joseph L. Casale wrote:
While faxing is working, I am seeing these in the log when I attempt to use rxfax:
switch_ivr_play_say.c:1154 Codec Activated L16@8000hz 1 channels 30ms switch_core_io.c:652 sofia/internal/1002@192.168.13.1 receive message [TRANSCODING_NECESSARY]
So later I see: switch_core_codec.c:128 sofia/internal/1002@192.168.13.1 Restore previous codec PCMU:0
So I am actually not clear on what's happening? I thought I had the ua set to PCMU but I guess fs is seeing the incoming sip session as L16 which I read is bad for fax? What's the significance of the last line where it states its restoring the old codec?
Can anyone shed some light on what's actually happening?
A-law and u-law are the right things for the transmission of FAX signals, but you can't actually do signal processing on an A-law or u-law signal. It needs to be converted to a 16 bit linear signal (i.e. L16) for that. What you see is the correct action. Steve