
5
Visit Cisco Connection Online at www.cisco.com
Note For detailed information about network modules (NMs), WAN interface cards (WICs), and Voice interface cards,
(VICs), see the “NMs, WICs, and VICs for the Cisco 3600 Series, 2600 Series, and 1600 Series” section in this chapter.
Cisco Multiservice over Virtual Private Network Reference Architecture
The Cisco Multiservice over Virtual Private Network (VPN) Reference Architecture is the industry’s first, fully-tested H.323-
based Class-4 PBX interconnect solution which enables service providers to offer their multi-site enterprise customers a
managed, packet-based integrated voice and data service over a VPN infrastructure. Built on an open architecture, this
standards-based VPN solution supports either MPLS or IPsec-based infrastructures.
http://www.cisco.com/warp/public/cc/so/neso/vpn/msovpn
Specifications
Hardware
Table 18-89: Technical Specifications for Cisco 3600 Series
Description Cisco 3620 Cisco 3640 Cisco 3660
Supported network interfaces Ethernet
Fast Ethernet
Token Ring
Asynchronous
Synchronous serial
High Speed Serial Interface
ISDN BRI (ST and U interfaces)
Channelized T1/ISDN PRI (with
and without CSU)
Channelized E1/ISDN PRI
(balanced and unbalanced)
Digital Modems
Analog Modems
Voice
ATM 25 Mbps
ATM OC3
Multiport T1/E1 ATM with IMA
(Inverse Multiplexing over ATM)
Same as Cisco 3620 Same as Cisco 3620
Supported Cisco IOS software Release 11.1 AA, Release 11.2 P,
11.3, and 11.3T, 12.0, 12.0T
Same as Cisco 3620 Release 12.0(5)T
Flash Memory 8 MB of Flash memory (SIMM),
expandable to 32 MB. PCMCIA
Flash memory cards are also
supported by each model, available
in 4 to 16 MB sizes.
Same as Cisco 3620 8 MB of Flash in the enterprise
models (3661-AC, 3661-DC, 3662-
AC, 3662-DC) and 16 MB in the
telco models (3662-AC-CO, 3662-
DC-CO) upgradable to 64 MB
DRAM memory (system and packet) 32 MB of DRAM memory
expandable to 64 MB.
32 MB of DRAM memory,
expandable to 128 MB.
32 MB of SDRAM for both
enterprise and telco models,
upgradable to 256 MB
Network module slots 2 4 6
Processor type 80 MHz IDT R4700 RISC 100 MHz IDT R4700 RISC 225 MHz RISC QED RM5271
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