2 CHAPT E R Preparing to Install the Cisco 2524 and Cisco 2525 Routers This chapter describes the tasks you must perform before you begin to install the Cisco 2524 and Cisco 2525 routers, and includes the following sections: • • • • • • Safety Recommendations General Site Requirements Installation Checklist Creating a Site Log Preparing to Connect to a Network Inspecting the System Safety Recommendations Follow these guidelines to ensure general safety: • • • • Keep the chassis area clear and dust-fr
Safety Recommendations Warning Ultimate disposal of this product should be handled according to all national laws and regulations. (To see translated versions of this warning, refer to the appendix “Translated Safety Warnings.”) Maintaining Safety with Electricity Follow these guidelines when working on equipment powered by electricity. Warning Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches).
Safety Recommendations Warning Read the installation instructions before you connect the system to its power source. (To see translated versions of this warning, refer to the appendix “Translated Safety Warnings.”) • Look carefully for possible hazards in your work area, such as moist floors, ungrounded power extension cables, frayed power cords, and missing safety grounds. • If an electrical accident occurs, proceed as follows: — Use caution; do not become a victim yourself.
General Site Requirements General Site Requirements This section describes the requirements your site must meet for safe installation and operation of your system. Ensure that your site is properly prepared before beginning installation. Site Environment The routers can be placed on a desktop or mounted in a rack or on a wall. The location of the routers and the layout of your equipment rack or wiring room are extremely important for proper system operation.
General Site Requirements Configuring Equipment Racks The following tips will help you plan an acceptable equipment rack configuration: • Enclosed racks must have adequate ventilation. Ensure that the rack is not overly congested because each unit generates heat. An enclosed rack should have louvered sides and a fan to provide cooling air. • When mounting a chassis in an open rack, ensure that the rack frame does not block the intake or exhaust ports.
Installation Checklist The router’s AC power supply includes the following features: • • Autoselects either 110V or 220V operation. All units include a 6-foot (1.8-meter) electrical power cord. (A label near the power cord indicates the correct voltage, frequency, current draw, and power dissipation for the unit.) Warning This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that a fuse or circuit breaker no larger than 120 VAC, 15A U.S.
Installation Checklist Installation checklist for site______________________________________________ Router name__________________________________________________________ Task Verified by Date Installation checklist copied Background information placed in Site Log Site power voltages verified Required tools available Additional equipment available Router received Optional UniverCD or printed documentation received Chassis components verified Initial electrical connections established ASCII terminal or
Creating a Site Log Creating a Site Log The Site Log provides a record of all actions relevant to the router. Keep it near the chassis where anyone who installs or maintains the router has access to it. Use the Installation Checklist (see the previous section, “Installation Checklist”) to verify steps in the installation and maintenance of your router. Site Log entries might include the following: • Installation progress—Make a copy of the Installation Checklist and insert it into the Site Log.
Preparing to Connect to a Network 2-Wire Switched 56-kbps DSU/CSU WAN Module The 2-wire switched 56-kbps DSU/CSU WAN module includes an RJ-11 port for connection to a WAN. Cables are not included with the modules; however, port pinouts are listed in the section “Fractional T1/T1 DSU/CSU Module Port Pinouts” in the appendix “Cabling Specifications for the Cisco 2524 and Cisco 2525 Routers.” Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and switched 56 cables.
Preparing to Connect to a Network 4-Wire 56/64-kbps DSU/CSU WAN Module The 4-wire 56/64-kbps DSU/CSU WAN module includes an RJ-48S port for connection to a WAN. Cables are not included with the module; however, port pinouts are listed in the section “4-Wire 56/64-kbps DSU/CSU Module Port Pinouts” in the appendix “Cabling Specifications for the Cisco 2524 and Cisco 2525 Routers. Warning Network hazardous voltages are present in the BRI, fractional T1/T1, and switched 56 cables.
Preparing to Connect to a Network Table 2-2 4-Wire 56/64-kbps DSU/CSU Module Network Specifications Description Specification Loop rates DDS1: 2.4, 4.8, 9.6, 19.2, 38.4, 56, and 64 kbps Switched 56: 56 kbps Data rates 2.4, 4.8, 9.6, 19.2, 56, and 64 kbps Line requirements DDS: AT&T Publication 62310 Switched 56: AT&T Publication 41458, Sprint TS-0046 Receiver sensitivity –45 dB at all loop rates 1. DDS = digital data system (leased or dedicated lines).
Preparing to Connect to a Network Table 2-3 Fractional T1/T1 DSU/CSU WAN Module Network Specifications Description Specification Line rate 1.544 Mbps1 Data rates n x 56 or n x 64 kbps, where n = 1 to 242 Standards AT&T Publication 62411, 54016, and 43801 1. Mbps = megabits per second. 2. The T1 interface is not channelized. ISDN Connections Use an appropriate cable (not included) to connect the router directly to an ISDN. (See Table 2-4.
Preparing to Connect to a Network Table 2-4 ISDN BRI Cable Specifications Specification High-Capacitance Cable Low-Capacitance Cable Resistance (at 96 kHz) 160 ohms/km 160 ohms/km Capacitance (at 1 kHz) 1 120 nF /km 30 nF/km Impedance (96 kHz) 75 ohms 150 ohms Wire diameter 0.024" (0.6 mm) 0.024" (0.6 mm) Distance limitation 32.8' (10 m) 32.8' (10 m) 1. nF = nanoFarad.
Preparing to Connect to a Network Table 2-5 EIA/TIA-232 Speed and Distance Limitations Data Rate (Baud) Distance (Feet) Distance (Meters) 2400 200 60 4800 100 30 9600 50 15 19200 50 15 38400 50 15 57600 25 7.6 115200 12 3.7 The use of balanced drivers allows EIA/TIA-449 signals to travel greater distances than the EIA/TIA-232 standard. Table 2-6 lists the standard relationship between baud rate and maximum distance for EIA/TIA-449 signals. These limits are also valid for V.
Preparing to Connect to a Network Ethernet Connections On the Cisco 2524 router, there are two Ethernet ports, an AUI port and a 10BaseT port, on the rear panel of the router. To connect your router to an Ethernet network, you can use either the Ethernet AUI or 10BaseT port, but not both. The router automatically detects which port is in use. (If you attempt to use both ports, only the 10BaseT port will work.
Preparing to Connect to a Network The main difference between the console and auxiliary ports is that the auxiliary port supports 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.
Inspecting the System Inspecting the System 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 have determined where you want the router installed, proceed with unpacking it. The router, cables, UniverCD or printed publications, and any optional equipment you ordered might be shipped in more than one container.
Inspecting the System 2-18 Cisco 2524 and Cisco 2525 Router User Guide
