[cisco-voip] CCM channel-group, pri-group or ds0-group ?

[Steven]

I wonder if anyone has experience of configuring CCM with a Siemens iSLX
exchange? I am using a 2820 router with vwic E1 card and a Westell 2000 plus
DPNSS to QSIG gateway. I am unsure as to what config I should use for the
Cisco config. Should I be using a channel group, pri-group or ds0-group? 

Thanks in advance 
Steven Jack

Steven Jack
Videoconferencing Manager
University of Glasgow
Computing Service
Glasgow G12 8QQ
UK
Tel +44(0)1413303828 Fax +44(0)1413303820
Email: s.jack at compserv.gla.ac.uk