What is maximuam site to site connection cisco router 2821

[LopezLas11]

Hi, i want to setup multiple site to site connection, between my headoffice and remote offices.
on HeadOffice, i've cisco router 2821, with IOS model:
c2800nm-adventerprisek9-mz.124-20.T.bin

There is no extra hardware module on this router, and i want to know the number>
What i've found on internet, is that is support up to 10 Cisco VPN Clients, but i've already tested it with 14 simultanious users, so i'm in doubt.
let me know

[Leo Laohoo]

Duplicate posts. :P GO here: https://supportforums.cisco.com/discussion/12135781/what-maximuam-site-site-connection-cisco-router-2821