I am hoping someone can help me with what is probably a really simple request !

I have a 2860 and am trying to enable a new 'guest' user account to allow customers to use the internet for only 15 minutes.

I have created a new guest account with unlimited max user login - the time quota has been set to 15 minutes.
The first guest logs in and the clock starts ticking but the second user gets however much is left of the initial 15 minutes instead of 15 minutes of their own.

Have I missed something or misunderstood the functionality of this feature ?

Any help would be gratefully received

If helps time quota
http://www.draytek.com/index.php?option=com_k2&view=item&id=5277&Itemid=293&lang=en
other options
http://www.draytek.com/index.php?option=com_k2&view=item&id=5458:ow-to-manage-internet-access-for-lan-clients-with-user-management-on-vigor2960-vigor3900&Itemid=293&lang=en
http://www.i-helpdesk.com.au/index.php?/Knowledgebase/Article/View/572/0/configuring-draytek-vigor2830-for-limited-guest-wi-fi-access

Thanks babis3g for your help with this. I followed the links and have successfully created a user who is able to login with a time quota at certain times of the day etc

Here comes the next part (!)

I need to be able to have a number of multiple guest accounts all with their own time quotas. Initially I tried to use the same guest account with multiple logins but the time quota was shared between them.
Next I opted to try different guest logins (guest1, guest2 etc) each with their own time quota. This part works as expected apart from resetting the time quota.
It is possible that we may have a guest login using the guest1 account, later that day another user may have to use the same guest account but will have no time quota until the time schedule resets overnight (hope that makes sense)
Are there any words of wisdom that you may be able to offer in this scenario please ?

Many thanks in advance