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... Cisco 3660, Cisco 3640, and Cisco 3620 routers support the following network applications and services: The voice / fax network modules for the Cisco 2600 and Cisco 3600 series multiservice access routers enable packet voice technologies including VoIP and Vo FR. Cisco's voice solutions provide the means for integrating both voice and data within a single network and allow users to take advantage of services, such as toll-bypass, without sacrificing voice quality. The digital T 1 /E 1 Packet Voice Trunk Network Module provides a flexible and scalable T 1 /E 1 voice solution and supports up to 60 voice channels in a single network module.

The analog voice / fax network modules slide into Cisco 2600 and 3600 chassis slots and contain either one or two voice interface card (VIC) slots. The VICs currently available are two-port foreign exchange station (FXS), foreign exchange office (FXO), E&M 2 -wire and 4 -wire interfaces and a basic rate interface (BRI). The voice modules support all major industry codecs including G. 711, G. 723, G. 726, G. 728, G. 729 and G. 729 a / b for customized solutions and to meet the need for high voice quality and bandwidth efficiency Four new multiport T 1 /E 1 ATM network modules with Inverse Multiplexing over ATM (IMA) and 3 ATM OC- 3 network module are now available for the 3600 series multiservice access platforms. These new multiport ATM modules allow service provider and enterprise customers to cost-effectively increase bandwidth, extending multiservice capabilities to remote-branch-office locations through ATM. These network modules support a robust set of ATM features including UBR, VBR-rt, VBR-nrt, and ABR ATM class of services, ATM Forum User Network Interface (UNI) 3. 0, UNI 3. 1, and UNI 4. 0 signaling, Permanent Virtual Circuits (PVCs) and Switched Virtual Circuits (SVCs), and ATM Adaptation Layer 5 (AAL 5) to name a few.

The Cisco 3600 is a mid-range dial-up platform that fits between Cisco's Access Path and AS 5300 products at the high end and the Cisco 2500 series access servers at the low end. Mixed-mode and high density ISDN and asynchronous configurations offer substantial flexibility in dial-up applications. Integrated digital modems (with support for PRI, BRI, CT 1 and R 2) and new integrated analog modems further enhance the dial access flexibility and scalability of the Cisco 3600. The Cisco 3600 series offers high levels of cost effective ISDN PRI concentration.

A Cisco 3640 configured with a Mixed Media LAN/ISDN PRI network module and three 2 -port ISDN PRI network modules supports up to 186 (T 1) or 240 (E 1) B channels. This is a powerful and cost effective way to aggregate many branch offices and telecommuters onto one corporate network. For areas of the world where ISDN BRI services are more widely available or cost effective, the Cisco 3600 series supports many BRI interfaces. Configured with a LAN network module and three 8 -port network modules, a Cisco 3640 connects up to 48 B channels. In this way, one system provides high-density BRI interface dial-up support and local LAN and WAN routing connectivity. With support for up to 48 synchronous serial interfaces on the Cisco 3660, the Cisco 3600 series and its RISC processor are the perfect complement to the Cisco 2600, 2500, 1700, and 1600 series.

The Cisco 3600 's higher performance and modular design are appropriate for locations needing support for multiple T 1 /E 1 links or the ability to change configurations in the future. Many corporate environments require support for a mixture of ISDN PRI, ISDN BRI, asynchronous serial, and synchronous serial connections. The Cisco 3600 series is ideal for this scenario. It allows migration between interfaces or simultaneous support of several technologies.

Multiservice access solutions and applications The three Cisco 3600 models allow new levels of connectivity and performance for branch offices with their scalable size, slot density, and cost. Combinations of network modules provide new opportunities for branch offices needing more than a fixed-configuration solution. The Cisco 3620, for example, provides multiple LAN access server support for asynchronous, ISDN, analog modem and digital modem environments, which complements the Cisco 2500 series access servers. Alternatively, a Cisco 3620 adds multiple LAN capabilities to branch bank environments needing to assimilate legacy serial devices, connecting them all to a high-speed Frame Relay network. Consistent with its other capabilities, the Cisco 3600 series offers midrange LAN-to-LAN connectivity for branch offices needing a flexible modular platform. The Cisco 2500 series, with a multitude of fixed configurations, offers cost effective branch office solutions including integrated routers and hubs, single and dual LAN routers, and multiple serial routers.

Network Module Options for the Cisco 3600 Series The Cisco 3660, Cisco 3640, and Cisco 3620 routers are 6 -, 4 - and 2 -slot multiservice access routers, respectively, whose LAN and WAN connections are configured by means of interchangeable network modules and WAN interface cards. The Cisco 3660 also incorporates 1 or optionally 2 integrated 10 / 100 (Ethernet/Fast Ethernet) ports. The following network modules are available for the Cisco 3660, Cisco 3640, and Cisco 3620 routers: Analog and Digital (T 1) Voice Network Modules Single-Port High-Speed Serial Interface (HSSI) 6, 12, 18, 24 and 30 digital modem network modules LAN with modular WAN (WAN Interface Cards) 8 and 16 analog modem network modules Channelized T 1, ISDN PRI and E 1 ISDN PRI network modules Combined Fast Ethernet and PRI network modules 4 - and 8 -port ISDN BRI network modules 16 - and 32 -port asynchronous network modules 4 - and 8 -port synchronous / asynchronous network modules 1 - and 4 -port Ethernet network modules 1 -port Fast Ethernet (10 / 100) network modules (100 Base T - "TX" and Fiber - "FX") 8 - and 16 -port analog modem modules Compression network module (Cisco 3620 and Cisco 3640, AIM for the Cisco 3660) In addition the Cisco 3660 supports 2 internal AIM slots. The Data Compression Advanced Integration Module (AIM) for the Cisco 3660 Series delivers a cost-effective option for reducing recurring wide-area network (WAN) costs and maximizing the benefit of the advanced bandwidth management features of Cisco IOS.

The Data Compression AIM takes advantage of either of the two available Cisco 3660 internal AIM slots, ensuring that external slots remain available for components such as integrated analog voice / fax , digital voice / fax , ATM, channel service unit / digital service units (CSU/Dsu's), analog and digital modems. The figure below shows how a vacant chassis slot on the Cisco 3640 accepts a mixed media network module, which in turn accepts a WAN interface card. Cisco 2600 Series Modular Access Routers Cisco Systems extends enterprise-class versatility, integration and power to branch offices with the Cisco 2600 series modular access router family, for an attractive price. The Cisco 2600 series modular architecture offers network managers and service providers a branch office solution that provides the versatility needed to adapt to changes in network technology, as new services and applications become available.

With full support of the Cisco IOS software, Cisco 2600 modular architecture provides the power to support the advanced Quality of Service (QoS), security, and network integration features required in today's evolving enterprise and service provider networks. The Cisco 2600 series shares modular interfaces with the Cisco 1600, 1700 and 3600 series, providing a cost-effective solution to meet today's branch office needs for applications such as: Secure Internet / intranet access with Firewall protection Multiservice voice / data integration Analog and digital dial access services Virtual Private Network (VPN) access While the pace of change in network technology continues to increase, global deregulation of telecommunications has allowed more service providers to compete for data, voice and video network services. Only companies who have designed their network infrastructures with these factors in mind will be able to benefit from the lower prices caused by increased competition and protect themselves from "technology lockout" in the future. The Cisco 2600 series features single or dual fixed LAN interfaces, a network module slot, two Cisco WAN interface card (WIC) slots, and a new Advanced Integration Module (AIM) slot.

LAN support includes single and dual Ethernet options; 10 / 100 Mbps auto sensing Ethernet; mixed Token-Ring and Ethernet; and single Token Ring chassis versions. WAN interface cards support a variety of serial, ISDN BRI, and integrated CSU/DSU options for primary and backup WAN connectivity, while available network modules support multiservice voice / data /fax integration, departmental dial concentration, and high-density serial options. The AIM slot supports integration of advanced services such as hardware-assisted data compression and in the future, encryption. All Cisco 2600 series routers include an auxiliary port supporting 115 Kbps Dial On Demand Routing, ideal for back-up WAN connectivity. As part of Cisco's comprehensive end-to-end networking solution, the Cisco 2600 series allows businesses to extend a cost-effective, seamless multiservice network infrastructure to the branch office. By deploying the Cisco 2600 series router, companies can consolidate the functions of multiple separate devices into a single, compact package that can be managed remotely.

Because the Cisco 2600 series is modular, interface configurations are easily customized to accommodate a wide variety of network applications. Some of these applications include the following: Multiservice Voice/Data/Fax Integration The Cisco 2600 Series reinforces Cisco's commitment to provide multiservice voice / data integration capabilities across its product portfolio, allowing network managers to save on long-distance inter-office toll charges and enabling next-generation voice-enabled applications such as integrated messaging and Web-based call centers. Using the sophisticated QoS features of Cisco IOS software, such as the Resource Reservation Protocol (RSVP), Weighted Fair Queuing (WFQ), FRF. 11 and FRF. 12, and IP Precedence, the Cisco 2600 series allows voice traffic to be digitized, encapsulated in data packets or Frames, and prioritized over other data traffic for a highly efficient, end-to-end network infrastructure for Voice over Frame Relay or Voice over IP. With support for up to 36 high-speed asynchronous ports or up to 64 ISDN B channels, the Cisco 2600 provides a cost-effective, single-box dial concentration solution for enterprise or service provider networks. By allowing users in remote locations to call a local phone number for access to both the corporate LAN or the Internet, enterprises can reduce toll charges.

For example, the Cisco 2600 series provides dial-up capability for up to 32 remote users, accommodating protocols such as PPP, SLIP, ARA, and X remote on any port, while supporting dedicated connections to the Internet and the corporate intranet. The new integrated 8 and 16 analog modem modules provide for a single box Remote Access Server solution with improved manageability. Virtual Private Network (VPN) Access and Firewall Protection Many companies have begun to use Virtual Private networks (VPNs) to reduce WAN costs by deploying secure tunneled connections via the Internet. VPNs can be rapidly set up and torn down to provide extranet links to customers, business partners and remote employees. With extra performance required to support advanced Cisco IOS security features such as IPSec and 3 DES encryption, the Cisco 2600 series can support multiple encrypted tunnels and provide the advanced security features of the Cisco IOS Firewall feature set. For example, a Cisco 2610 router in the branch office can provide secure privileged access to business partners while also supporting another connection to a Cisco 2621 in the main office.

The dual-LAN architecture of the Cisco 2621 allows the customer to create an external subnet or "DMZ" for a public Web server outside the firewall while providing security for the internal network. Simultaneously, remote users can connect to local point of presence Cisco 5300 which tunnels across the Internet to the same 2621 saving on long distance or " 1 - 800 " connection charges. Cisco IOS features such as tunneling, data encryption, and termination of Remote Access WANs via IPSec, Layer 2 Forwarding (L 2 F) and Layer 2 Tunneling Protocols (L 2 TP) make the Cisco 2600 an ideal platform for building virtual private networks or outsourced dial solutions. The Cisco 2600 provides a cost-effective, flexible solution for concentrating serial devices in remote locations.

Async / sync ports provide connections to serial devices such as SDLC concentration devices, alarm systems, ATMs, debit / credit terminals and cash registers. With full Cisco IOS protocol support including SDLC, BSC, BTSUN, STUN, X. 25, Frame Relay, and polled async, the Cisco 2600 consolidates traffic from a wide variety of serial devices over a single connection, eliminating costly dial-up BSC links. The 4 - or 8 -port asynchronous / synchronous network modules can be combined with, for example, the mixed Ethernet/Token Ring Cisco 2612 and integrated CSU/DSU and BRI WICs to address various retail or financial branch office environments. Stacking the Cisco 2600 series with Cisco LAN switches such as the Catalyst 1900, 2820 and 2900 XL series enables network administrators to manage remote branch office environments efficiently using CiscoWorks and Cisco View network management solutions. Cisco 2600 offers a variety of connectivity options with the reliability and high performance required to address today's evolving branch office WANs. Up to 8 dedicated 128 -kbps synchronous connections, one ISDN BRI and one T 1 /fractional T 1 Frame Relay connections can be simultaneously supported with a single Cisco 2600.

The Cisco 2600 offers a unique combination of versatility, integration and power at an attractive price for branch office LAN-to-LAN routing applications. Many of today's multiple device solutions gateways can be integrated into one Cisco 2600 configuration. Cisco 2600 's RISC-based processor provides the power needed for the dynamic requirements of the remote branch office, achieving wire speed Ethernet to Ethernet routing with up to 25 thousand packets per second (Kids) throughput capacity. The Cisco 2600 's combination of fixed LAN port (s) along with modular interfaces provide customers with the ability to change or meet future networking requirements without a "forklift upgrade. " As part of Cisco's comprehensive end-to-end networking solution, the Cisco 2600 series supports the value of end-to-end Cisco network solutions with the following benefits: Allows network managers to save long-distance inter-office toll charges and enable next-generation voice applications such as integrated messaging and Web-based call centers. Because the Cisco 2600 series supports field-upgradable modular components, customers can easily change network interfaces without a "forklift upgrade" of the entire branch office solution. The AIM slot of the Cisco 2600 platform further protects investments by enabling new services such as hardware-assisted data compression and, in the future, hardware-assisted data encryption without using an external interface slot.

To maximize network uptime, the Cisco 2600 series offers a redundant power supply (RPS), which can be shared with other Cisco products. The Cisco 2600 series also supports Cisco IOS reliability features such as dial-on- demand routing (DDR) to restore both data and voice services automatically in the event of a primary link failure. Integrating the functions of CSU/Dsu's, ISDN Network Termination (NTI) devices, modems, firewall, compression and encryption devices and other equipment found in branch office wiring closets in a single, compact unit provides a space-saving solution that can be managed remotely using network management applications such as CiscoWorks and Cisco View. Part of a Cisco end-to-end solution As part of Cisco's comprehensive end-to-end networking solution, the Cisco 2600 series allows businesses to extend a cost-effective, seamless multiservice network infrastructure to the branch office.

The Cisco 2600 series is available in the following six base configurations: Cisco 2612: One Ethernet port and One Token Ring port Cisco 2620: One 10 / 100 Mbps auto-sensing Ethernet Port Cisco 2621: Two 10 / 100 Mbps auto-sensing Ethernet Ports Each model also has two WAN interface card slots, one network module slot, and one AIM slot. All Cisco 2600 s include the Cisco IOS IP feature set; other feature sets may be selected as upgrade options. web Fixed-Configuration Desktop Access Routers 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.

There are currently three Cisco 1000 series models: One Type- 2 PCMCIA slot for Flash ROM card One ISDN BRI WAN port (RJ- 45), with an integrated NT 1 device One Type- 2 PCMCIA slot for Flash ROM card One serial WAN port (DB- 60) that supports asynchronous serial communications up to 115. 2 kbps (EIA/TIA- 232 interface) and synchronous serial such as leased lines, Frame Relay, switched 56 kbps, SMDS, and X. 25 up to 2. 048 Mbps (EIA/TIA- 232, EIA/TIA- 449, V. 35, X. 21, and EIA- 530) One Type- 2 PCMCIA slot for Flash ROM card Cisco 1003 and Cisco 1004 ISDN Routers The Cisco 1003 and Cisco 1004 routers are small, desktop routers that connect small, remote sites with Ethernet LANs to ISDN WANs. The main difference between the two routers is that the Cisco 1004 router includes an integrated network termination 1 (NT 1) device and the Cisco 1003 router does not. The ISDN service provider supplies the NT 1 connection worldwide, except in North America, where the NT 1 device is supplied by the customer. Therefore, the Cisco 1004 router is for use in North America, and the Cisco 1003 router is applicable worldwide. The rear view of the routers looks the same except for the following differences, shown in the following figure: The BRI port on the Cisco 1003 is labeled "ISDN S/T, " and "Cisco 1003 " is stamped on the upper left corner of the chassis (not illustrated).

The BRI port on the Cisco 1004 is labeled "ISDN U, " and "Cisco 1004 " is stamped on the upper left corner of the chassis (not illustrated). The Cisco 1003 and Cisco 1004 routers include the following standard features: One Ethernet 10 Base T port with an RJ- 45 connector One ISDN BRI port with an RJ- 45 connector (the Cisco 1004 router includes an integrated NT 1 device) One console port with an RJ- 45 connector Console cable kit and power supply One external PCMCIA slot for optional Type- 2 Flash memory card Software booting over an Ethernet LAN using TFTP Optional Flash memory card to store software image and configuration files, allowing network-independent booting and software updates over the WAN or LAN connections LAN-to-LAN DDR routing over ISDN lines PPP compression and bandwidth-on-demand with load balancing for throughput up to 512 kbps Increased security with CHAP, PAP, packet filters, local password and CLI/ANI Network management and monitoring through the console port or over the network using SNMP or Telnet Information about devices is from Cisco web site and it can be found on: web Bibliography: IT proffesional


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