Question : vpn concentrator client

I haven't used a VPN concentrator b4 ... was wondering if anybody can give me an idea on how can i connect to somebody's vpn concentrator ... is it a normal IpSec based tunnel (site-to-site) or is it like remote vpn where I need a vpn client to connect to the other person's vpn server .... I have a c1841 router that am currently using for ipsec tunnels with different sites and a requirement has come up to connect to a partner's vpn whose using vpn concentrator ... any help would be appreciated ?

Answer : vpn concentrator client

You can use the cisco vpn client (would be easier) for the users. They will just double click and connect, if you distribute the pcf file among them. Requires minimal config in the concentrator.

Also, the 1841 router can be configured for s2s tunnel with the concentrator. (requires config on both ends).