[Asterisk-Users] Cisco 7960 Echo

[Nathan]

I don't know if it matters, but some versions of the Cisco 7960 firmware
have a bug where there is an echo if the volume is over 75%..

Might want to try lowering the volume below 75%, and trying again..

Nathan

On Fri, 14 Mar 2003, Mike Reiling wrote:

> No, since the echo happens even when calling locally.  Should I turn it
> on for the T100P (analog phones attached to channel bank)?
>
> Thank,
> Mike
>
> On Friday, March 14, 2003, at 12:18  PM, Richard Tomson II wrote:
>
> > Have you turned on the echo cancellation on the X100P?
> > Check the zaptel Makefile. I use the Mark2 with Aggressive_suppressor.
> >
> > Rich.
> >
> > On Fri, 2003-03-14 at 10:42, Mike Reiling wrote:
> >> Hello everyone,
> >> 	I finally got my Cisco 7960.  Seems like a very nice phone.  I have
> >> it
> >> configured for SIP and working with asterisk.  But, I am having some
> >> echo problems.  The person I call does not hear an echo, but I hear my
> >> own voice echo back to me about .5 seconds later (maybe a little
> >> less).
> >>   Does not matter if I call an internal Zap extension, or outbound
> >> over
> >> my X100P.  I changed the codecs, around and the one that gives the
> >> least amount of echo is g729a.
> >>
> >> It is plugged in my office, but my asterisk server is in the attic,
> >> with a wireless link.  Could that be a problem.  There is very minimal
> >> latency.  A traceroute from the phone shows this:
> >>
> >> SIP Phone> traceroute cartman
> >> traceroute to cartman(192.168.100.3), 30 hops and 40 byte packets
> >> SIP Phone>
> >>     1)    192.168.100.3     10ms    1ms   10ms
> >>
> >> The server is a celeron 433.  Should I toss a faster processor at the
> >> computer, or is it the wireless link?  I can't really image it being
> >> the wifi link, as VOIP works over the internet, with much higher
> >> latency.
> >>
> >> Any suggestions?
> >>
> >> Thanks,
> >> Mike
> >>
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> >
> >
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> >
> --
> Mike Reiling
> Systems & Network Administrator
> SoftCoin, Inc.
> 2000 Sierra Point Parkway
> Brisbane, CA  94005
> 650-624-3869 - P
> 650-624-3899 - F
>
> It might look like I'm doing nothing, but at the cellular level I'm
> really quite busy.
>
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