[Asterisk-Users] Re: Random Echo

[Steve Brown]

I'm using some even older 32 ms 2551 and 2531's on my fxo and fxs lines. 
They work just like TC says. No training time, the echo is just gone.

There is a serial, menu-driven interface on the Tellabs racks that makes 
them really easy to configure. My only complaint is that the rack is 
designed to hold 16 of them, is really big and needs a separate -48V 
supply. And the cabling on the newer 255 racks is optimized for 16 cans 
and is sort of complicated for only 1.

I've started to build an enclosure for just 2 of them that runs from a 
48v wall wart.  I'm tired of explaining what the empty rack is for.

Steve


TC wrote:

>>I did some google search but
>>didn't find any details, about how to configure between Adtran 750 and
>>T100P. If you have already done, please give us some details.
>>    
>>
>
>not sure what level of dtl you want its quite straight fwd
>It varies depending on the chasis but in general
>there are T1 in and T1 out DB-15's for each T1 circuit you want to echo
>cancel.
>
>A straight T1 rj-45 cable goes to the channel bank other end is db-15 in to
>Tellab
>then a T1 X over goes from the Tellab db-15 out to the T100p card
>
>Then there are external Mode and Chan switchs that allow you to configure
>the T1
>circuit  (the line bld, framing, and coding/signaling), and then other
>setting to allow
>channels FXO/FXS LS, GS and enable echo cancel channel by channel,
>I do it for all fxs/fxo ports and turn ALL * echo cancel in zapata OFF..
>
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