Hi all,
I have been testing the hfc-4s driver (isdn--devel--0.1--patch-662) with
Asterisk 1.2.4 and I was getting broken voice in one direction as follows:-
PSTN <---- HFC-4S <------ ASTERISK <--------- IAX2
; very bad
PSTN <---- HFC-4S <------ ASTERISK (playing IVR message) ;
not too bad
PSTN <---- HFC-4S <------ ASTERISK <--------- SIP phone ;
good
No problem in the opposite direction. All sounds good. Also no such
problems with the HFC-E1 driver in both directions.
In function hfc_sys_chan_write() in hfc-4s, I uncommented the line
'printk(KERN_DEBUG "Trimming output fifo\n")' and
I got lots of these messages when I made a call. So I decided to disable
the next line "goto not_copying", and that fixed the problem! Maybe the
constant HFC_FIFO_JITTBUFF_HIGH (10) is set too low. The number of
used_octets varies from 11-383. Apparently this bit of code is not
found in the same function for the HFC-E1 driver.
Cheers,
Stephen Yong
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