[Asterisk-Users] E1 config help and guidance

[asterisk]

I've googled / voip-info'd / searched until my eyes are blurry, but couldn't
see the info I was looking for. I've turned here for help!

Asterisk CVS head (9/7/04)
Fedora Core 2 (updated to 2.6.6 kernel)
DE405P (jumpers set to E1)

I want to put asterisk in the middle of our current pbx (Meridian Option11)

Currently the meridian has a 2MB pri EuroISDN card linked via a rj-45 into a
euroISDN bearer. This bearer only has 10 channels activated (out of the 30).
Obviously, this works - handsets make external calls.

What I wanted to do was to add * to the mix, in the middle so that it can
intercept inbound / outbound calls and do what it needs to do, as well as
providing all the extra functionality that this wonderful product provides.

In order to achieve this, I assumed that I needed to take rj45 from the
bearer box and plug that into span 2, and take a cable from span 1 into the
bearer box.

My problem (and blurry eyes) come from not understanding the various
protocols to assign to each span. I want the meridian to think that it's
still plugged into the EuroISDN bearer. So span 2 should be set up as a
EuroISDN link ? What should span 1 be set up as ? What channels should be
configured ?

Any guidance (I'm not looking for the solution (would be nice!) but for
pointers in the right direction).

I have previously been able to set up asterisk using the x100p and graduated
to BRI isdn. I just got the 405 today and wanted to play!

Thanks in advance.

Julian.