[Asterisk-Users] EuroISDN BRI 2 or 4 wires?

[Remco Barende]

Hi List!

Have a weird problem with ISDN in The Netherlands.

The line that is coming in from the telco is 2 wires. The line is 
connected to an NT1 using the middle pair of a UTP connector. So far sop 
good.

However, the outgoing ports on the NT1, should they be wired with 2 wires 
or 4 (2 pairs)?

If I use a 4 wire cable and stick it in the NT1 I get 0 voltage on the 
middle 2 wires, but i get approx 4 volts on the left 2 wires and another 
40 volts on the outer (right) 2 wires. Is it correct that 2 pairs should 
be used to connect ISDN devices?

Sorry for this slightly offtopic issue. The house is fully 
wired for one pair which means I may have a problem if i need 2 pairs.

Thanks!
Remco