Use of cisco IOS router as vpn client

Hi,
I would like to use a cisco 881 SEC K9 router to open a client VPN Ipsec session.
The informations i have are :
Host=xxx.xxx.xxx.xxx
GroupName=bla-bla-bla
GroupPwd=VeRyCoMpLiC@Ted-PwD
Username=user@dept-company.tld
UserPassword=AnOtHeR-VeRyCoMpLiC@Ted-PwD
All discussions i read explain the use of PC VPN Client or may be i do not search well.
If somebody can give me some way to do it will be appreciate.
CE