About Cisco 1600 Series Routers

The Cisco 1600 series have become the proven choice for data access for small branch offices and small businesses because they offer a range of features specifically designed for such applications:

• Modular design for wide-area network (WAN) choice and flexibility
• Advanced security, including optional integrated firewall, encryption, and virtual private network (VPN) software
• End-to-end quality of service (QoS) and multimedia support
• Integrated data service unit/channel service unit (DSU/CSU) with up to T1 speed and integrated Network Termination (NT1)
• Low cost of ownership through WAN bandwidth optimization
• Ease of use, deployment, and management

Cisco 1600 series routers connect small offices with Ethernet LANs to WANs through Integrated Services Digital Network (ISDN), asynchronous serial, and synchronous serial connections.

The five basic configurations of the Cisco 1600 product family offer the following ports:

• Cisco 1601 R — one Ethernet, one serial, one WAN interface
• Cisco 1602 R — one Ethernet, one serial with integrated 56-kbps DSU/CSU, one WAN interface card slot
• Cisco 1603 R — one Ethernet, one ISDN Basic Rate Interface (BRI) (S/T interface), one WAN interface card slot
• Cisco 1604 R — one Ethernet, one ISDN BRI with integrated NT1 (U interface), one S-bus port for ISDN phones, one WAN interface card slot
• Cisco 1605 R — two Ethernet slots, one WAN interface card slot

The serial WAN port on the Cisco 1601 R router supports asynchronous serial connections of up to 115.2 kbps and synchronous serial connections — such as Frame Relay, leased lines, Switched 56, Switched Multimegabit Data Service (SMDS), and X.25 — of up to 2.048 Mbps. The Cisco 1602 R router integrates a 56-kbps four-wire DSU/CSU, and it supports the same synchronous serial connections as the Cisco 1601 R router (except SMDS). The ISDN BRI port on the Cisco 1603 R router has an S/T interface, while the Cisco 1604 R includes an integrated NT1 with a U interface. The Cisco 1605 R router provides a 10BaseT and an AUI port on the first Ethernet interface and a 10BaseT port on the second Ethernet interface.

Run From RAM Architecture
The 1601 R-1605 R routers have a "run-from-RAM" architecture; the "R" suffix designates run from "RAM". The Cisco IOS software image is stored in Flash memory (in compressed form), but is loaded into RAM before being executed by the router.

The Run-from-RAM models offer the following benefits:

1. Greater Performance — The Cisco 1600 R models deliver greater performance for memory-intensive applications such as encryption and compression.

2. Easier Upgradability — The Cisco 1600 R routers permit software upgrades over any interface while the router is running

3. Lower Cost — Because the Cisco 1600 R models store the software in compressed form in Flash memory, less flash memory is required to run advanced feature sets (such as Cisco 1600 series IOS IP Plus). The new Cisco 1600 R routers (1601 R, 1602 R, 1603 R, and 1604 R) are essentially the same as the original models (1601-1604), but they are "run-from-RAM" routers, similar to the Cisco 1605 R model introduced in late 1997. The new Cisco 1600 R models deliver all the features and benefits of the original models, including the same interfaces, the same functionality, the same feature sets, and the same versions of Cisco IOS (R) software and have the same physical dimensions.

Cisco Routers

Cisco 800 Series Routers 801, 802, 803, 804, 805, 806. 826, 827H, 827-4V, 828 ADSL and G.SHDSL	The Cisco 800 series products are designed to provide small offices and teleworkers business class features for a variety of WAN technologies. The Cisco 800 Series includes four ISDN routers, one serial router, and two IDLS router models and a choice of software feature sets. The Cisco 801 model provides an ISDN Basic Rate Interface (BRI) ST interface for use worldwide. The Cisco 802 adds the integrated NT1 network termination device for use in North America. The Cisco 803 and 804 models add a four-port Ethernet hub and two RJ-11 interfaces for telephone devices such as telephones, fax machines, and modems. The Cisco 805 offers one serial port for synchronous serial connections or asynchronous dial up connections with an external modem. For IDSL connections, the Cisco 802 IDSL provides one IDSL port with one Ethernet port and the Cisco 804 IDSL adds an integrated 4-port Ethernet hub.
Cisco 1000 Series Routers 1003, 1004, 1005	The Cisco 1000 series of compact, fixed-configuration routers provide low-cost, high-speed connectivity for branch and small offices. Available in synchronous and asynchronous models. The Cisco 1003 and Cisco 1004 routers are small, desktop routers that connect small, remote sites with Ethernet LANs to ISDN WANs. The Cisco 1005 router is a small, desktop router that connects small, remote sites with Ethernet LANs to synchronous WANs at speeds up to 2.048 Mbps or to asynchronous WANs at speeds up to 115.2 kbps.
Cisco 1400 Series Routers 1401, 1417	The Cisco 1400 series is a new generation of DSL routers-powered by Cisco IOS software, for small and medium-sized businesses and small branch offices of enterprises. The Cisco 1400 series offers high-speed internet and intranet access with advanced security, high quality-of-service, ease-of-use, and management. The Cisco 1400 series is a key part of Cisco`s comprehensive end-to-end DSL networking solutions. The Cisco 1401 router features a 10BaseT Ethernet interface and an ATM25 interface, which allows connectivity to an ATM cell-based WAN infrastructure. The ATM25 interface provides an external demarcation point as required by many telcos and can be combined with an external ATM25 (ADSL) modem to provide high-speed Internet/intranet access up to 8 Mbps. The Cisco 1417 router features a 10Base-T Ethernet interface and an integrated ADSL DMT modem, with integrated ATM capabilities. The Cisco 1417 can be connected to DSL Access Multiplexors (DSLAMs) which implement the ANSI ADSL DMT Issue-2 specification, such as the Alcatel DMT issue 2 DSLAMs
Cisco 1600 Series Routers 1601, 1602, 1603, 1604, 1605	The Cisco 1600 series have become the proven choice for data access for small branch offices and small businesses because they offer a range of features specifically designed for such applications. Cisco 1600 series routers connect small offices with Ethernet LANs to WANs through Integrated Services Digital Network (ISDN), asynchronous serial, and synchronous serial connections. Cisco 1601 R — one Ethernet, one serial, one WAN interface Cisco 1602 R — one Ethernet, one serial with integrated 56-kbps DSU/CSU, one WAN interface card slot Cisco 1603 R — one Ethernet, one ISDN Basic Rate Interface (BRI) (S/T interface), one WAN interface card slot Cisco 1604 R — one Ethernet, one ISDN BRI with integrated NT1 (U interface), one S-bus port for ISDN phones, one WAN interface card slot Cisco 1605 R — two Ethernet slots, one WAN interface card slot
Cisco 2500 Series Routers 2501, 2502, 2503, 2504, 2505, 2507, 2509, 2510, 2511, 2512, 2513, 2514, 2515, 2516, 2520, 2521, 2522, 2523, 2524, 2525, 2501CF, 2501LF, 2502CF, 2502LF, 2503I, 2504I, 2520CF, 2520LF, 2521CF, 2521LF, 2522CF, 2522LF, 2523CF and 2523LF	The Cisco 2500 series routers provide a variety of models designed for branch office and remote site environments. These routers are typically fixed configuration with at least two of the following interfaces: Ethernet (AUI); 10BaseT Ethernet hub; Token Ring; Synchronous serial; Asynchronous serial; ISDN BRI Cisco 2500 routers come with Flash EPROM technology for simplified software maintenance. These systems support a variety of Cisco IOS software feature sets, so you can choose a feature set that supports your specific protocol environment. The software feature sets range from an IP and bridging-only to the full array of Cisco`s software functionality, including APPN and RMON. Mission-specific models contain less memory and less hardware functionality to support a subset of protocols. Each mission-specific model can be upgraded to full router capability by downloading a new Cisco IOS software feature set and, if necessary, adding memory.
Cisco 2600 Series Routers 2610/11, 2610XM/11XM, 2612, 2620/21, 2620XM/21XM, 2650/51, 2650XM/51XM, 2691	The Cisco 2600 Series adds a greater range of performance and scalability for end-to-end networking solutions, allowing businesses to extend a cost-effective, seamless network infrastructure to the branch office. The Cisco 2600 series is an award-winning family of modular multiservice access routers, providing flexible LAN and WAN configurations, multiple security options, voice/data integration, and a range of high performance processors. This range of features make the Cisco 2600 family the ideal branch-office router for today`s and tomorrow`s customer requirements. The latest additions to the Cisco 2600 Series family of Modular Routers include the Cisco 2600XM models and the Cisco 2691. These new models deliver extended performance, higher density, enhanced security performance and increased concurrent application support to meet the growing demands of branch offices.
Cisco 3600 Series Routers 3620, 3640, 3660	The Cisco 3600 series is a multifunction platform that combines dial access, routing, and LAN-to-LAN services and multiservice integration of voice, video and data in the same device. The Cisco 3600 series includes the Cisco 3660, the Cisco 3640, and Cisco 3620 multiservice platforms. As modular solutions the Cisco 3660, the Cisco 3640, and Cisco 3620 have the flexibility to meet both current and future connectivity requirements. The Cisco 3600 series is fully supported by Cisco IOS software, which includes analog and digital voice capability, ATM access with T1/E1 IMA or OC-3 interfaces, dial-up connectivity, LAN-to-LAN routing, data and access security, WAN optimization, and multimedia features.