asterisk users - Mar 2009 - Asterisk to Ericsson MD110 on E1 with ISDN-USR (not QSIG)?

I have been asked by a potential customer whether we can connect an
Asterisk box to an Ericsson MD110 that has an E1 port with ISDN-USR.
They are unable or unwilling to upgrade their E1 port to QSIG.

Has anyone here had experience of successfully making such a connection?
I have found a couple of hits on Google that suggest it "should" work,
but I'm after something a little more definitive, based on actual
experience, if possible.

Can anyone tell me what the "USR" part of ISDN-USR actually means?

Thanks
Tony

-- 
Tony Mountifield
Work: tony at softins.co.uk - http://www.softins.co.uk
Play: tony at mountifield.org - http://tony.mountifield.org

Tony Mountifield wrote:
> I have been asked by a potential customer whether we can connect an
> Asterisk box to an Ericsson MD110 that has an E1 port with ISDN-USR.
> They are unable or unwilling to upgrade their E1 port to QSIG.
> 
> Has anyone here had experience of successfully making such a connection?
> I have found a couple of hits on Google that suggest it "should"
work,
> but I'm after something a little more definitive, based on actual
> experience, if possible.
> 
> Can anyone tell me what the "USR" part of ISDN-USR actually
means?
> 
> Thanks
> Tony
> 
I would assume that "USR" is the user side of the connection, where
the other side is the "NET". The * term is "CPE". But that
does not
describe which protocol they are using (EuroISDN, QSIG, etc..).

But thats only a guess.

Best regards

Hans