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Table Of Contents
Preparing to Install the Router
Preventing Electrostatic Discharge Damage
Tools and Equipment for Installation and Maintenance
Console and Auxiliary Port Considerations
Preparing to Connect to a Network
Configuring Serial Connections
Asynchronous/Synchronous Serial Module Baud Rates
56-K/Switched-56-kbps DSU/CSU Connections
Preparing to Install the Router
This chapter describes important information to consider before you begin to install a Cisco 2600 series router, and includes the following sections:
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Tools and Equipment for Installation and Maintenance
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After you have completed this chapter, proceed to Chapter 3, "Installing the Router" for installation instructions.
Safety Recommendations
Follow these guidelines to ensure general safety:
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Safety with Electricity
Follow these guidelines when working on equipment powered by electricity:
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In addition, use the following guidelines when working with any equipment that is disconnected from a power source, but still connected to telephone wiring or other network cabling:
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Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It can occur if electronic printed circuit cards are improperly handled and can cause complete or intermittent failures. Always follow ESD prevention procedures when removing and replacing modules:
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Caution
General Site Requirements
This section describes the requirements your site must meet for safe installation and operation of your router. Ensure that the site is properly prepared before beginning installation. If you are experiencing shutdowns or unusually high errors with your existing equipment, this section can also help you isolate the cause of failures and prevent future problems.
Power Supply Considerations
Check the power at your site to ensure that you are receiving "clean" power (free of spikes and noise). Install a power conditioner if necessary.
Warning
The AC power supply includes the following features:
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Table 2-1 describes power requirements for Cisco 2600 series routers.
Table 2-1 Power Requirements for Cisco 2600 Series Routers
AC
100 - 240 VAC, 1.0 A, 50 - 60 Hz
85 - 264 VAC
DC
48 - 60 VDC, 3.0 A
38 - 72 VDC
Site Environment
The router can be placed on a desktop or mounted in a rack. Single rack-unit (1RU) routers can also be mounted on a wall. The location of the chassis and the layout of your equipment rack or wiring room are extremely important for proper system operation. Placing equipment too close together, inadequate ventilation, and inaccessible panels can make system maintenance difficult or cause system malfunctions and shutdowns.
When planning your site layout and equipment locations, remember the precautions described in the next section, "Site Configuration," to help avoid equipment failures and reduce the possibility of environmentally caused shutdowns. If you are currently experiencing shutdowns or unusually high errors with your existing equipment, these precautions may help you isolate the cause of the failures and prevent future problems.
Site Configuration
The following precautions will help you plan an acceptable operating environment for your router and help you avoid environmentally caused equipment failures:
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Equipment Racks
Cisco 2600 series routers with chassis height of 1 RU can be installed in 19-, 23-, and 24-inch racks.
Cisco 2600 series routers with chassis height of 2 RU can be installed in 19- or 23-inch racks.
The following information will help you plan your equipment rack configuration:
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Installation Checklist
The sample Installation Checklist lists items and procedures for installing a new router. Make a copy of this checklist and mark the entries when completed. Include a copy of the checklist for each router in your Site Log (described in the next section, "Creating a Site Log").
Installation checklist for site _____________________________________________
Router name _______________________________________________________
Installation Checklist copied
Background information placed in Site Log
Site power voltages verified
Installation site power check completed
Required tools available
Additional equipment available
Router received
The appropriate quick start guide for your router received
Cisco 2600 Series, Cisco 3600 Series, and Cisco 3700 Series Regulatory Compliance and Safety Information document received
Product registration card received
Cisco.com contact information label received
Chassis components verified
Initial electrical connections established
ASCII terminal (for local configuration) or modem (for remote configuration)
Signal distance limits verified
Startup sequence steps completed
Initial operation verified
Software image verified
Creating a Site Log
The Site Log provides a record of all actions related to the router. Keep it in an accessible place near the chassis where anyone who performs tasks has access to it. Use the Installation Checklist to verify steps in the installation and maintenance of the router. Site Log entries might include the following:
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Inspecting the Router
Do not unpack the router until you are ready to install it. If the final installation site will not be ready for some time, keep the chassis in its shipping container to prevent accidental damage. When you are ready to install the router, proceed with unpacking it.
The router, cables, publications, and any optional equipment you ordered may be shipped in more than one container. When you unpack the containers, check the packing list to ensure that you received all the following items:
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Inspect all items for shipping damage. If anything appears to be damaged, or if you encounter problems installing or configuring your router, contact customer service. Warranty, service, and support information is in the quick start guide that shipped with your router.
Tools and Equipment for Installation and Maintenance
You need the following tools and equipment to install and upgrade the router and its components:
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To install a Cisco 2600 router of 1 rack-unit height on a wall, you need suitable screws or wall anchors.
In addition, depending on the type of modules you plan to use, you might need the following equipment to connect a port to an external network:
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Console and Auxiliary Port Considerations
The router includes an asynchronous serial console port and an auxiliary port. The console and auxiliary ports provide access to the router either locally using a console terminal, or remotely using a modem connected to the auxiliary port. This section discusses important cabling information to consider before connecting a console terminal, which can be either an ASCII terminal or a PC running terminal emulation software, to the console port or modem to the auxiliary port.
The main difference between the console and auxiliary ports is that the auxiliary port supports hardware flow control and the console port does not. Flow control paces the transmission of data between a sending device and a receiving device. Flow control ensures that the receiving device can absorb the data sent to it before the sending device sends more. When the buffers on the receiving device are full, a message is sent to the sending device to suspend transmission until the data in the buffers has been processed. Because the auxiliary port supports flow control, it is ideally suited for use with the high-speed transmissions of a modem. Console terminals transmit at slower speeds than modems; therefore, the console port is ideally suited for use with console terminals.
Console Port Connections
The router has an EIA/TIA-232 asynchronous serial console port (RJ-45). Depending on the cable and the adapter used, this port appears as a DTE or DCE device at the end of the cable.
For connection to a PC running terminal emulation software, your router is provided with an RJ-45 to DB-9 adapter cable.
To connect the router to an ASCII terminal, use an RJ-45 rollover cable and an RJ-45-to-DB-25 female adapter (not provided).
The default parameters for the console port are 9600 baud, 8 data bits, no parity, and 1 stop bit. The console port does not support hardware flow control. For detailed information about installing a console terminal, refer to the "Connecting to a Console Terminal or Modem" section on page 3-20.
For cable and port pinouts, refer to the Cisco Modular Access Router Cable Specifications document online or on the Documentation CD-ROM.
Auxiliary Port Connections
The router has an EIA/TIA-232 asynchronous serial auxiliary port (RJ-45) that supports flow control. Depending on the cable and the adapter used, this port appears as a DTE or DCE device at the end of the cable.
For connection to a modem, your router is provided with an RJ-45-to-DB-25 adapter cable.
For detailed information about connecting devices to the auxiliary port, refer to the "Connecting to a Console Terminal or Modem" section on page 3-20.
For cable and port pinouts, refer to the Cisco Modular Access Router Cable Specifications document online or on the Documentation CD-ROM.
Preparing to Connect to a Network
When setting up your router, consider distance limitations and potential electromagnetic interference (EMI) as defined by the applicable local and international regulations.
Network connection considerations are provided for several types of network interfaces and are described in the following sections:
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Refer to the following online documents for more information about network connections and interfaces:
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Warning
Ethernet Connections
The IEEE has established Ethernet as standard IEEE 802.3. The most common Ethernet implementations are as follows:
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Table 2-2 lists the router models described in this guide and summarizes the LAN interfaces supported on each model.
Token Ring Connections
The Cisco 2612 router provides both an Ethernet interface and a Token Ring shielded UTP interface. The Cisco 2613 router provides a single Token Ring interface. (See Table 2-2.)
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.
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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. Refer to the section "Token Ring Port Pinouts" in the Cisco Modular Access Router Cable Specifications online document for the Token Ring port pinouts. This document is available online and on the Cisco Documentation CD-ROM.
Serial Connections
Serial connections are provided by WAN interface cards and network modules. The WAN interface cards can be installed in either slot of the 2-slot chassis; the network module can be installed in the Cisco 2600 series single network module slot. For more information on WAN interface cards, refer to the Cisco Interface Cards Hardware Installation Guide. For more information on network modules, refer to the Cisco Network Modules Hardware Installation Guide. These documents are accessible online and on the Cisco Documentation CD-ROM.
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Before you connect a device to a serial port, you need to know the following:
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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 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.) If you cannot determine the device type in the documentation, see Table 2-3 to help you select the proper device type.
Table 2-3 Typical DTE and DCE Devices
DTE
Male1
Terminal
PC
DCE
Female2
Modem
DSU/CSU
Multiplexer
1 If pins protrude from the base of the connector, the connector is male.
2 If the connector has holes to accept pins, the connector is female.
Signaling Standards Supported
The synchronous serial ports available for the router support the following signaling standards: EIA/TIA-232, EIA/TIA-449, V.35, X.21, and EIA-530. You can order a Cisco DB-60 shielded serial transition cable that has the appropriate connector for the standard you specify. The documentation for the device you want to connect should indicate the standard used for that device. The router end of the shielded serial transition cable has a DB-60 connector, which connects to the DB-60 port on a serial WAN interface card. The other end of the serial transition cable is available with a connector appropriate for the standard you specify.
The synchronous serial port can be configured as DTE or DCE, depending on the attached cable (except EIA-530, which is DTE only). To order a shielded cable, contact customer service. See the "Obtaining Documentation" section on page xvii.
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Although manufacturing your own serial cables is not recommended (because of the small size of the pins on the DB-60 serial connector), cable pinouts are provided in the Cisco Modular Access Router Cable Specifications.
Distance Limitations
Serial signals can travel a limited distance at any given bit rate; generally, the slower the data rate, the greater the distance. All serial signals are subject to distance limits, beyond which a signal significantly degrades or is completely lost.
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Table 2-4 lists the recommended maximum speeds and distances for each serial interface type; however, you might get good results at speeds and distances greater than those listed, if you understand the electrical problems that might arise and can compensate for them. For instance, the recommended maximum rate for V.35 is 2 Mbps, but 4 Mbps is commonly used.
Balanced drivers allow EIA/TIA-449 signals to travel greater distances than EIA/TIA-232 signals. The recommended distance limits for EIA/TIA-449 shown in Table 2-4 are also valid for V.35, X.21, and EIA-530. Typically, EIA/TIA-449 and EIA-530 can support 2-Mbps rates, and V.35 can support 4-Mbps rates.
Asynchronous/Synchronous Serial Module Baud Rates
The following baud-rate limitations apply to the slow-speed serial interfaces found in the asynchronous/synchronous serial modules:
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ISDN BRI Connections
The BRI WAN interface cards provide Integrated Services Digital Network (ISDN) Basic Rate Interface (BRI) connections. The BRI modules and BRI WAN interface cards are available with either an S/T interface that requires an external Network Terminator 1 (NT1), or a U interface that has a built-in NT1.
You can install the BRI modules in any available slot in the chassis.
Warning
Use a BRI cable (not included) to connect the BRI WAN interface card directly to an ISDN. Table 2-5 lists the specifications for ISDN BRI cables. Also, refer to the Cisco Modular Access Router Cable Specifications online document for pinouts. This document is located on Cisco.com and the Documentation CD-ROM.
Table 2-5 ISDN-BRI Cable Specifications
Resistance (at 96 kHz)
160 ohms/km
160 ohms/km
Capacitance (at 1 kHz)
120 nF1 /km
30 nF/km
Impedance (at 96 kHz)
75 ohms
150 ohms
Wire diameter
0.024 in. (0.6 mm)
0.024 in. (0.6 mm)
Distance limitation
32.8 ft (10 m)
32.8 ft (10 m)
1 nF = nanoFarad
For more information on BRI WAN interface cards, refer to the Cisco Interface Cards Installation Guide online document. This document is located on Cisco.com and the Documentation CD-ROM.
56-K/Switched-56-kbps DSU/CSU Connections
Switched-56-kbps connections are provided by the 56-kbps DSU/CSU WAN interface card.
For more information on Switched-56-kbps WAN interface cards, refer to the Cisco Interface Cards Installation Guide online document. This document is located on Cisco.com and the Documentation CD-ROM.
