Pinouts for T1/E1 crossover cable WAS "RE: [Asterisk-Users] what cable to connect a legacy PBX to a TE410P ?"

[Dinesh Nair]

On 04/25/06 05:58 Sangoma Techdesk said the following:
> At Sangoma we do quite a lot of back-to back T1 and E1 
> connections. T1 is not a very fussy connection, as the baud 
> rate is only about 750 kbps.
>  
> In our experience, for error free communications you can use 
> the following rules of thumb:
> Up to 50 ft:  Flat patch cable
> Up to 500 ft: Ordinary twisted telephone cable Cat 5 may be 
> overkill unless you are going hundreds of feet.

we've faced weird intermittent problems and we suspect it's related to 
electrical interference caused by power cables et al in the server rack. 
we've seen this with both sangoma and digium cards when attempting to 
connect asterisk boxes to carrier E1s provided by the local operator. the 
cables used are normal cat5 UTP cables.

-- 
Regards,                           /\_/\   "All dogs go to heaven."
dinesh at alphaque.com                (0 0)    http://www.alphaque.com/
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