[Asterisk-Users] Newbie: ISDN E1 the same in all countries?

[Peter Svensson]

On Fri, 11 Feb 2005, Sverrir Valgeirsson wrote:

> I'm looking at ordering a 30-channel ISDN connection from telia (a swedish
> operator) and then using a Wildcard TE110P card with that and asterisk to do
> IVR. 
> 
> Can I be certain that the TE110P card will work with that ISDN connection? A
> 30 channel ISDN certainly sounds like an E1 connection, but I couldn't get
> any clear answers from the operator if
> it is.

An 30-channel isdn PRI is always delivered over E1 (or perhaps several 
aggregated into an E3 or similar). However, an E1 can be delivered over 
two phisucal interfaces, 75 ohm unbalanced coaxial cables terminated in 
two BNC connectors or as an 120 ohm balanced twisted pair terminated in an 
RJ45 connector. You want to order the later.

The TE410P works well in Sweden so the TE110P should as well.

The implementation notes that specify the isdn interfaces on the Telia 
network are available from http://www.skanova.se/index.asp?lev=1636.

Remember that there are lots of options on isdn. Unless you are familiar 
with isdn telephony yourself you may consider getting some help in 
ordering the line and setting up your system.

Peter