[Asterisk-Users] Connection TDM400P to UK PSTN

[John Novack]

The jacks on the TDM are ( incorrectly ) referred to as RJ45, correctly 
they are 8 position modular.
The line, either in or out is on the two CENTER pins. NONE of the other 
6 pins are used.
Though I am not in the UK, from what I know you don't use the two center 
pins for a single line connection, so you will need to fashion some sort 
of adapter to connect. Frankly, using the two center pins ( A Bell 
System brain blizzard) wasn't the smartest idea. It makes the modular 
plug into, with the addition of just a little moisture, a really good  
spark gap when a ring signal or small induction of lightning is applied. 
I have seen many a modular plug turned black and useless  since the 
introduction of modular in the US in the early 70's

Good luck

John Novack


Graham Kiff wrote:

> I'm a complete Asterisk novice and have an installation based on the 
> Asterisk at Home <mailto:Asterisk at Home>CD.
>  
> I've installed my TDM400P with 2 x FXO & 2 x FXS, but every time I try 
> to dial out, I get a message "No circuits available".
>  
> Can someone confirm the pinouts for connecting the FXO's to a UK BT 
> Line - I have RJ11 connectors on the back of my TDM400P card, so 
> ideally I'd like to know the pin mappings from a standard BT plug to RJ11.
>  
> Cheers
> Graham
>
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