Cisco Systems 3700 Series Token Ring Connections, Serial Connections, Serial DTE or DCE Devices

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Chapter 2 Preparing to Install the Router

Preparing to Connect to a Network

Token Ring Connections

The IEEE has established Token Ring as standard IEEE 802.5. Specifications indicate a maximum segment distance of 328 feet (100 meters) for UTP cabling.

Note To ensure agency compliance with FCC Class B electromagnetic emissions requirements (EMI), make sure that you use a shielded RJ-45 Token Ring cable when connecting your router to a Token Ring network.

Token Ring can operate at two different ring speeds: 4 and 16 Mbps. All devices on the Token Ring must use the same operating speed.

Use a Token Ring cable to connect the router to a switch. See the section “Token Ring Port Pinouts” in the Cisco Modular Access Router Cable Specifications document for Token Ring port pinouts. This document is available on Cisco.com.

Serial Connections

Serial connections are provided by WAN interface cards and network modules. For more information on WAN interface cards, see the Cisco Interface Cards Installation Guide. For more information on network modules, see the Cisco Network Modules Hardware Installation Guide. These documents are available on Cisco.com.

Before you connect a device to a serial port, you need to know the following:

•Type of device—data terminal equipment (DTE) or data communications equipment (DCE)—that you are connecting to the synchronous serial interface

•Type of connector—male or female—required to connect to the device

•Signaling standard required by the device

Configuring Serial Connections

The serial ports on the asynchronous/synchronous serial network modules and the serial WAN interface card use DB-60 connectors. Serial ports can be configured as DTE or DCE, depending on the serial cable used.

Serial DTE or DCE Devices

A device that communicates over a synchronous serial interface is either a DTE or a DCE device. A DCE device provides a clock signal that paces the communications between the device and the router. A DTE device does not provide a clock signal. DTE devices usually connect to DCE devices. The documentation that accompanied the device should indicate whether it is a DTE or DCE device. (Some devices have a jumper to select either DTE or DCE mode.) Table 2-2lists typical DTW and DCE devices.

Cisco 3700 Series Routers Hardware Installation Guide

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Contents Cisco 3700 Series Routers Hardware Installation Guide Corporate HeadquartersBook Title N T E N T S Site Environment Entering ROM Monitor Mode B-1 Cisco 3700 Series Routers Hardware Installation Guide Preface ObjectivesConventions AudienceOrganization Chapter Title DescriptionSafety Warnings Bewaar Deze InstructiesWarnung Wichtige Sicherheitshinweise Avvertenza Importanti Istruzioni Sulla SicurezzaAviso Instruções Importantes DE Segurança Guarde Estas InstruçõesGEM Disse Anvisninger Xiii Related Documentation Cisco Product Document Title Cisco.com Obtaining DocumentationDocumentation Feedback Ordering DocumentationSubmitting a Service Request Obtaining Technical AssistanceCisco Technical Support Website Definitions of Service Request Severity Obtaining Additional Publications and InformationXix OL-2180-08 Hardware Features Cisco1shows the rear panel of the Cisco 3725 router Modules, Interface Cards, and Memory 2shows the rear panel of the Cisco 3745 routerDescription Specification MemoryInterface Numbering Cisco 3725 InterfacesWAN and LAN Interface Numbering Voice Interface Numbering Gigabit Ethernet 2/0Cisco 3745 Interfaces Network-module-slot/voice-module-slot/voice-interface Power Supply Options Internal -48 V Telephony Power ModulesPower Supply Option Cisco Cisco 3725 Router with Optional -48 V Power Module Installed System Specifications Regulatory Compliance Preparing to Install the Router Safety RecommendationsSafety with Electricity Preventing Electrostatic Discharge DamagePower Supply Considerations Router Power Supply Input Power Input VoltageGeneral Site Requirements Site Configuration Site EnvironmentEquipment Racks Installation Checklist Task Verified by DateCreating a Site Log Inspecting the RouterPage Console and Auxiliary Port Considerations Console Port ConnectionsAuxiliary Port Connections Preparing to Connect to a Network Ethernet ConnectionsSerial Connections Configuring Serial ConnectionsToken Ring Connections Serial DTE or DCE DevicesSignaling Standards Supported Distance LimitationsDevice Type Gender Typical Devices EIA/TIA-232 Isdn BRI ConnectionsAsynchronous/Synchronous Serial Module Data Rates Distance EIA-530 Distance Rate bps Feet Meters56-K/Switched-56-kbps DSU/CSU Connections Low-Capacitance CableOL-2180-07 Installing the Router Setting Up the Chassis Setting the Chassis on a DesktopLeft Rack-Mounting the ChassisAttaching Brackets to the Cisco 3725 Router Cisco 3745 Router-Brackets for 19-Inch RackRight wide bracket Attaching Brackets to the Cisco 3745 Router RightMounting the Router in a Rack 63387Installing the Chassis Ground Connection 11 Mounting the Chassis in a Rack TypicalCisco 3725 Router Ground Connection Ground lugCisco 3745 Router Ground Connection Power Connections Installing the Router Power ConnectionsWiring the DC-Input Power Supply in Cisco 3725 Routers Connecting Routers to AC PowerConnecting Routers to a DC-Input Power Supply 15A, 120VAC 10A, 240VAC. StatementDC Power DC Input Source DC Input Wire Size Wire Terminal Lug Protection+ B 17 DC Wire Routing and Attachment for Cisco 127039 Wiring the DC-Input Power Supply in Cisco 3745 Routers DC Input Wire Installed Power Supply DC Input Size Wire SizeNegative polarity input 0V return Safety ground Connecting WAN, LAN, and Voice Cables Connecting Routers to the Cisco Redundant Power SystemPorts and Cabling Connection Procedures and Precautions Port or Connection Port type, color CableConnecting to a Console Terminal or Modem Connecting to the Console Port24 Connecting a Console Terminal to a Cisco 3725 Router Connecting to the Auxiliary Port Specifications on Cisco.comIdentifying a Rollover Cable 28 Identifying a Rollover CablePowering Up the Router Checklist for Power UpFront Panel Indicators Power-Up Procedure Cisco 3745 LED IndicatorsYourname con0 is now available Press Return to get started Configuring the Router Initial Configuration Using SDMInitial Configuration Using the Setup Command Facility Shown as examples only Configuration is displayed Initial Configuration Using the CLI Manual Configuration Press Return to bring up the Router prompt OL-2180-08 Troubleshooting Solving Problems Troubleshooting the Power and Cooling SystemsEnvironmental Reporting Features Troubleshooting Modules, Cables, and ConnectionsReading Front-Panel LEDs ACT LED SYS/RPS LED PWR LEDLED Indicator State Description SYS/RPSReading Rear Panel LEDs SYS PS1Power Error Messages ETMSystem Amber Error LED Type LED Color MessagePS1, PS2 Amber Error LED on PS1, PS2 Amber Recovering a Lost Password Using the ROM Monitor Entering ROM Monitor ModeROM Monitor Commands Enter ROM Monitor Mode by Using the reload CommandROM Monitor Command Descriptions Boot Commands in the ROM MonitorROM Monitor Syntax Conventions Cisco 3700 Series Routers Hardware Installation Guide Informational Commands in the ROM Monitor Other Useful ROM Monitor Commands Debugging Commands in the ROM MonitorConfiguration Register Modifying the Configuration Register in Menu Mode Modifying the Configuration Register by Hexadecimal EntryRecovering Cisco IOS Software Images Description and Options of the xmodem CommandConsole Requirements Procedure for the xmodem Command Messages similar to the following appearOL-2180-08 Configuration Register Settings Bit Number Hexadecimal MeaningChanging Configuration Register Settings Your router is now in the normal operating modeConfiguring the Boot Field Boot Field MeaningBit Address net host Enabling Booting from CompactFlash Memory Data Rate BitOL-2180-08 Symbols IN-2 IN-3 IN-4 IN-5 IN-6

3700 Series specifications

Cisco Systems 3700 Series routers are a pivotal part of Cisco's portfolio, designed for medium to large enterprises aiming to deliver secure and efficient networking capabilities. Introduced as a versatile solution, these routers provide a comprehensive blend of performance, scalability, and investment protection.

One of the standout features of the Cisco 3700 Series is its modular architecture, allowing organizations to customize their router according to specific needs. This modularity supports various modules for different functions, including voice, data, and video, making the 3700 Series an ideal choice for converged networking environments. Administrators can enhance functionality through an array of WAN and voice interface cards that adapt as the organization's needs evolve.

The 3700 Series is built on Cisco's IOS (Internetwork Operating System), ensuring robust and high-quality performance. It supports advanced routing protocols including EIGRP, OSPF, and BGP, facilitating efficient data transmission across diverse environments. This versatility helps organizations implement sophisticated multi-site connectivity and enables reliable performance in complex network scenarios.

Security is a paramount concern in modern networking, and the Cisco 3700 Series delivers with features such as integrated firewall services, VPN support, and intrusion detection capabilities. These security measures protect sensitive data and ensure secure communication between remote sites—critical in today’s cyber landscape.

Another key characteristic of the 3700 Series is its support for Quality of Service (QoS), which prioritizes time-sensitive traffic such as voice and video. By ensuring that critical applications receive the bandwidth they require, organizations can maintain the quality of service that their users expect.

Moreover, the Cisco 3700 Series is designed with redundancy in mind. Features like dual power supplies and hot-swappable fan trays enhance reliability and uptime, which are crucial for mission-critical applications.

Furthermore, energy efficiency is an increasingly important consideration in network design. The Cisco 3700 Series adheres to modern energy standards, helping reduce the overall carbon footprint while supporting high-performance capabilities.

In summary, the Cisco Systems 3700 Series routers stand out for their modularity, advanced routing capabilities, robust security features, and energy efficiency, making them an optimal choice for enterprises that not only need performance but also flexibility and reliability in their networking solutions. As businesses continue to evolve and adapt, the Cisco 3700 Series is a dependable partner in their connectivity journey, ensuring they can meet current demands while preparing for future challenges.
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