Hi,i want to implement an ip telephony solution at our office.I have bought the following:

Cisco 3560 poe switch.

Cisco 2811 router with 3 FXO cards.

Cisco 7911 and 7940 ip phones.

At the least,the system should support the following:

Confrence calls.

Voice mail.

Call Transfer.

Intergate with existing non-cisco ip phones.

Call-parking capabilities.

Limits set for each user.

User Authentication.

And any other features supported on ip telephony.

I have heard a lot about Cisco callmanager,cisco unity express could anyone guide on where i need to install CUE and CCME which version?so that all the above features are supported.

I will appreciate any kind of assistance towards this end.

I'll also appreciate any kind of info on CUE.

Thanks a lot.