CISCO2811-CCME/K9 VOICE BUNDLE: Cisco 2811 Integrated Services Router
Cisco CallMgr Express Feat Lic FL-CCME-36 supp for 36 phones
PVDM2-16 ; 64MB Flash/256 MB DRAM, IOS SP Services Feat Set
PORTS: 2 x 10/100 LAN ; 2 x Onboard USB ports (1.1)
1 x Console port ; 1 x Auxiliary port
ONBOARD SLOT : 2 x Onboard AIM slots
MEMORY : CFlash memory 64 MB ; Max: 256 MB
DRAM memory 256MB ; Max: 760 MB
I/FACE SLOTS: 4 slots, each slot can support HWIC, WIC, VIC, or VWIC
This URL should help you:
http://www.cisco.com/en/US/products/hw/routers/ps259/prod_eol_notice0900aecd804446da.html