[Asterisk-Users] tdm400 fxo problem

[Rich Adamson]

> I'm experiencing a very weird behaviour with my tdm400 with two fxo and one fxs 
modules. I setup my current
> configuration at home, I tried it and it works flawlessly. I moved the computer to my 
office and plugged the fxo to
> the wall plug, but when I tried to call I got a busy signal. I attached the same wire 
to a phone, I called again and
> the phone rang. I tried with both the fxo ports, but I always got a busy signal and 
on the CLI Asterisk doesn't
> notice the incoming call at all. Outgoing calls do not work either.
> So I moved again the computer to the home of a friend, and it there it works too as 
it does at my place. When I
> plugged the TDM at the office no other phone was plugged in the whole structure.
> 
> I'm really puzzled and I don't know why it is behaving this way. Any hints?

Are you sure the phones and system at work are not electronic/digital sets?