[A*UG] local at&t pstn/pots AC terminal impedance values

[Chris Tooley]

What you really need to ask for is what the Austin Telecom settings
are.  Honestly you'd be better off asking Birch (are they still in
business), or some other CLEC.  AT&T is notoriously bad (especially in
Texas) in regards to giving up info like this.  It's probably
something in the non-COMPLEX range, but I don't remember anymore, it's
been too long since I've dealt with them.

On Tue, Sep 30, 2008 at 5:02 PM, Wayne Walker <wwalker at bybent.com> wrote:
> On Tue, Sep 30, 2008 at 04:07:51PM -0500, Ryan Vanderwerf wrote:
>> Hi, new to the group. I've set up a recent system, and I'm getting a
>> lot of echo on a GXP-2000 phone through a PSTN line at the value of 600R-
>> 600 ohms.
>> My options are:
>> 600R - 600 ohms</option>
>> 600C - 600 ohms + 2.16uF</option>
>> 900R - 900 ohms</option>
>> 900C - 900 ohms + 2.16uF</option>
>> COMPLEX1 - 220 ohms + (820 ohms || 115nF)
>> COMPLEX2 - 270 ohms + (750 ohms || 150nF)
>> COMPLEX3 - 370 ohms + (620 ohms || 310nF)
>> COMPLEX4 - 600R 270 ohms + (750 ohms || 150nF)
>> COMPLEX5 - 320 ohms + (1050 ohms || 230nF)
>> COMPLEX6 - 350 ohms + (1000 ohms || 210nF)
>> COMPLEX7 - 200 ohms + (680 ohms || 100nF)
>> COMPLEX8 - 370 ohms + (820 ohms || 110nF)
>> COMPLEX9 - 275 ohms + (780 ohms || 115nF)
>> COMPLEX10 - 120 ohms + (820 ohms || 110nF)
>>
>> I'm trying to play the the AC terminal impedance values, and I was
>> wondering if anyone knew what value the local Austin area AT&T PSTN/Pots
>> lines use? I figured I'd ask before trying all of them.
>>
>> Thanks
>>
>> Ryan Vanderwerf
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>
> Welcome to the group.  It's been very quiet in here for a while.
>
> I just got back from Astricon, but I'm on the backend side of the game
> and rarely touch phones or even FXO/FXS ports.
>
> --
>
> Wayne Walker
>
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>