[Asterisk-Users] Generic X100P's

Steve Edwards asterisk.org at sedwards.com
Mon Oct 11 21:49:01 MST 2004 

On Mon, 11 Oct 2004, Ken Alker wrote:

> When you recommend a channel bank to eliminate echo, are you assuming use of 
> a T-1 with the channel bank?

Yes.

[Yes, that was flippant, but my inexperience doesn't allow me to give you 
a difinitive answer :) My opinion that a channel bank would not have an 
echo problem was based on my single host with a t1 with no echo problem 
versus my single host with a tdm40p and an x101p with an echo problem -- 
that and my observation that all of the queries I have seen regarding echo 
in the last few months that I've been reading the list have involved 
tdmxxp and/or x10xp cards. Whether my opinions and observations are 
correct, I'll have to leave to list members with more experience and 
knowledge.]

On Mon, 11 Oct 2004, Ken Alker wrote:

> Steve -
>
> When you recommend a channel bank to eliminate echo, are you assuming use of 
> a T-1 with the channel bank?  I'm curious because I bought a used CAC ADIT600 
> with 24 FXO lines and 8 FXS.  I'm terminating my 8 POTs lines into 8 of the 
> FXO lines on the ADIT600 as I don't have a T-1.  The ADIT600 is connected to 
> my Asterisk box via a T100P.  I'm using Cisco 7960 IP phones. I'm having 
> local echo problems (customer calling in can't hear the echo but my agents 
> hear it).  Thus, I'm using a channel bank and I've got the problem.
>
> --On Monday, October 11, 2004 5:49 PM -0700 Steve Edwards 
> <asterisk.org at sedwards.com> wrote:
>
>> On Mon, 11 Oct 2004, Erik Espinoza wrote:
>> 
>>> Just want to test with real phone lines to ensure that they
>>> work with our existing pbx before deploying with 8 lines using the
>>> tdm400p's
>> 
>> Consider using a t100p and a channel bank. Here's the breakdown:
>> 
>>  	TDM				T1
>>  	--------------------		----------------------------
>>  	2 x tdm40b	$610		1 x t100p		$495
>>  					1 x channel bank*	$200
>>  					1 x breakout box	$100
>>  	--------------------		----------------------------
>>  			$610					$795
>> 
>> * I purchased a used (looks new to me) Adtran TA750 with 4 fxo and 20 fxs
>> ports for $225 a couple of weeks ago. I've seen loaded TA750's go for
>> between $150 and $350. An Adtran 600 would also be a good choice.
>> 
>> For the additional $185, you get 16 additional ports, no echo problems,
>> and no interupt problems.
>> 
>> I chose a breakout box for my on-the-road demo kit. You may already have
>> a 66 block or a 110 block wired up.
>> 
>> Also, if you can get the fxo lines off your old pbx on a t1, you may
>> shave off a bit more.
>> 
>> I've got 1 host with a tdm40b and an x101p and another host with the
>> t100p and the channel bank. The "T1" host is rock solid.
>> 
>> On Mon, 11 Oct 2004, Erik Espinoza wrote:
>> 
>>>> If reply all actually responds to the reply-to header and reply doesn't,
>>>> your MUA is broken.
>>> 
>>> There is no reply-to header being added in from the asterisk-users
>>> mailing list, I double checked this by looking through other peoples
>>> posts. The MUA works fine with mailing lists that actually add the
>>> reply-to header.
>>> 
>>>> 2 cards is the highest number recommended. But as I mentioned, it won't
>>>> be completely representative of your suggested final deployment and may
>>>> cause you unforeseen trouble. If you are being serious about testing for
>>>> real deployments, you should go ahead and buy final hardware. If you are
>>>> testing to deploy for a customer, you need to be very aware of your
>>>> final hardware.
>>> 
>>> Thanks for the heads up, I'll keep that in mind. I'm building a system
>>> that is just going to recieve user calls for help and call the person
>>> who is supposed to be on call for the night. This will be tested
>>> amongst our managers for a few days, making sure that calls ar routed
>>> properly and that the software works as promised before purchasing the
>>> final hardware. The agi's are all written and in the 'all voip' system
>>> work fine. Just want to test with real phone lines to ensure that they
>>> work with our existing pbx before deploying with 8 lines using the
>>> tdm400p's
>>> _______________________________________________
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>>> 
>> 
>> Thanks in advance,
>> ------------------------------------------------------------------------
>> Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
>> Newline           pagesteve at sedwards.com            Fax: +1-760-731-3000
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>
>
>
> /**************************************************************
> Ken Alker         ken at impulse.net            ham radio: KA6SDU
> Impulse Internet Services               http://www.impulse.net
> Santa Barbara,  San Luis Obispo,  Ventura, Los Angeles, Orange
> T-3 / T-1 / ADSL / ISDN / 56K / web hosting / wireless / co-lo
> ***************************************************************/
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Thanks in advance,
------------------------------------------------------------------------
Steve Edwards      sedwards at sedwards.com      Voice: +1-760-468-3867 PST
Newline           pagesteve at sedwards.com            Fax: +1-760-731-3000

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