I have a strange situation that I am hoping someone can shed some light on
I am putting a WAN in place for 50 sites in the UK where all the branch locations have a ADSL Tail into an MPLS Cloud and a ISDN 2 backup that dials into the HQ.
The HQ has 2 x 2811 routers, 1 that deals with the MPLS connection (34 Mbps) for primary access and one that houses 2 x ISDN30e's so that the sites can dial into incase the primary link goes down.
The 2811 that is housing the 2 x ISDN30e's at the HQ does not have any PVDM's as its data only, and is not doing any voice but seems to only accept a configuration of PRI Group rather than channel Groups? and thus requires some PVDM's?
Can anybody shed any light on this, I am sure I do not need any PVDM's for data only ISDN trafic.
A configuration guide would be great, but i cant seem to find one thanks