Bug#601034: Same behaviour here

[martin.stern at jpberlin.de]

Hello,

i use cheap HFC-Cards with dahdi and zaphfc here.

andrew:/etc/dahdi# lsdahdi
### Span  1: ZTHFC1 "HFC-S PCI A ISDN card 0 [TE] " (MASTER) AMI/CCS
  1 BRI        Clear       (In use) (SWEC: OSLEC)
  2 BRI        Clear       (In use) (SWEC: OSLEC)
  3 BRI        Hardware-assisted HDLC  (In use)

andrew:/etc/dahdi# lsmod | egrep "dahdi|hfc|echo"
dahdi_echocan_oslec     1038  4
echo                    2988  1 dahdi_echocan_oslec
dahdi_transcode         3802  0
zaphfc                 11961  3
dahdi                 174416  9 dahdi_echocan_oslec,dahdi_transcode,zaphfc
crc_ccitt               1039  1 dahdi


If I set "echocancel=yes" in /etc/asterisk/chan_dahdi.conf my system 
freezes every time after one to two minutes of calling.
After setting "echocancel=no" this problem disappears.

I am not shure if this has really disabled echo cancellation, because, 
even after reboot:
- lsdahdi still shows OSLEC
- Kernelmodules dahdi_echocan_oslec is still in use
- I hear no echo


Regards,
Martin