Specifications

Feature	Cisco 1861 Series	Cisco 1841 Series	Cisco 1800 Series Fixed- Configuration Routers
Target Applications	Small Office Unifield	Secure Data with frame relay or	Secure data with broadband access and backup WAN
	Communicate Data and Security	leased line access (T1/E1)
DRAM	Cisco IOS Software: 256 MB	Synchronous dual line memmory	Synchronous dual line memmory module
	Voice messaging: 512 MB	module (DIMM) DRAM	(DIMM) SDRAM (1DIMM slot)
DRAM capacity		Default 128 MB; Max: 384 MB	Default 128 MB; Max: 384 MB
Flash memory	Cisco IOS Software: 128MB	External removeable compact Flash	External removeable compact Flash
	Voice messaging: 1 GB; Compact Flash
Flash memory capacity		Default 32 MB; Maximum 128 MB	Default 32 MB; Maximum 128 MB
Cisco IOS Sofware	Cisco IOS software 12.4(11) XW or	IP Base- 12.4(1)	12.3(8)YI
default image	Higher Releases
Cisco IOS Sofware	SP Service K9	IP Base (security and broadbnd	Advanced IP services (without voice services) except
default image		bundles have image upgrades)	Cisco 1801 which Cisco IOS IP Broadband
Routing Protocols	BGP, EIGRP, OSPF, RIP v.1, RIP v.2	BGP, EIGRP, OSPF, RIP v.1, RIP v.3	BGP, EIGRP, OSPF, RIP v.1, RIP v.4
Routed Protocols	IPv4, IPv6 unicast only (IPX, IBM SNA,	IPv4, IPv6 unicast only (IPX, IBM SNA,	IPv4, IPv6 unicast only (IPX, IBM SNA,
	Apple Talk, supported with optimal	Apple Talk, supported with optimal	Apple Talk, supported with optimal
	Advanced Enterprice Services Feature Set	Advanced Enterprice Services Feature Set	Advanced Enterprice Services Feature Set
QoS Protocols	WFQ, CBWFQ,WRED, CAR, RSVP, Network	WFQ, CBWFQ,WRED, CAR, RSVP, Network	WFQ, CBWFQ,WRED, CAR, RSVP, Network
	Based Application Recognition	Based Application Recognition	Based Application Recognition