Re: Asterisk

On Sun, 2006-01-22 at 21:19 -0900, Jon Reynolds wrote:
> Shane R. Spencer wrote:
>
> > We deployed around 35 snom 360's at work.. with and without the x100p
> > and some TDM400's. We primarily use a T100P and PRI signalling for our
> > voice at the office. Even though they are purely digital lines you will
> > always have issues with echo, esp up here. I have never had such crazy
> > echo issues.. however asterisk can do echo cancellation w/ the zaptel
> > cards. or with a pseudo timer interface. Never tried grandstream. not
> > very impressed with snom at the moment. their 5.0 firmware fixes so many
> > things, then completely breaks a good flowing UI.
> >
> > You are welcome to schedule a time to stop by and see our setup if you
> > are still considering this.
> >
> > Shane
>
> What are the echo issues you are having? I was under the impression that
> because of using pure digital you would remove the hybrid from your end
> and then it would be up to the CO's hardware to suppress the echo. Are
> you only having echo on the TDM400's or also on the PRI lines, and at
> what side of the call are you getting the echo, is it the near or far side?

ugh.. heh.. Ok so ACS didn't believe me that I was having awesome echo
issues. I know we have an ACS'er on the list so maybe he can give me
some insight.

We had issues with echo hitting POTS and PRI anywhere within ACS's
network. Calling tech support.. calling my home phone.. calling another
business.. but not with cellular or long distance calls.

I learned a bit more didn't retain much, they pad the call at a certain
level when it hits the cell network and long distance network. So thats
how I trained our gain.. over PRI.. which is something you just plain
shouldn't have to do as far as I know. So all with the t100p. the
tdm400 fxo modules and x100p are going to be subject to the added
latency on your side of the POTS line and come up with some fun echo
almost in any situation until you train it, which in most cases was
easier :)

> I am using the echo suppresor of the zaptel drivers and have had to
> lower my gains down extremely low to even get the echo manageable. I got
> my gains at the 14000 level and was able to loop out through the CO and
> back in so I had the TX/RX correct but it still sucked. I was hoping
> that by moving to a pure digital it would solve the echo. At this point,
> I have echo right at the very beginning of the call for about 1 second
> until the echo cans kick in. Then I get an echo sometimes during the
> call also.
>
> I have seperated my phone network to it's own switch with nothing else
> on the same segment, so there is only the phone traffic on the network.
> The snoms are of a better quality, the handset is where I think I was
> getting some echo from the gxp-2000's, you get what you pay for.
>
> Thanks Shane for the offer to check out your setup, if you were serious
> I will take you up on it, could I bring a friend?
>
> Jon
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Received on Mon Jan 23 08:06:21 2006