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939
2004 May 03
3
RFD: With echo and other distortion, can ulaw/alaw line quality ever be good enough for faxing?
...pied by digital fax
boards, connected to asterisk via AT&T 5ESS PRI. And of course there's the
7960 handsets, connected directly to a switch at 100MBps (fdx).
Challenge a)
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In terms of looking into a), we started with:
http://asterisk.sohoskyway.net/Asterisk_Doc/current/docs-html/x939.html
Clearly some of the details are outdated, since the echo canceller options
live in zconfig.h now, not a Makefile, but it's a decent starting point.
Which gives rise to my first question - which echo canceler should we be
using? We have Steve, Steve 2, and Mark 1-3, with an aggressive opti...