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Preparing for the Cisco AS5200 Universal Access Server
This chapter describes the tasks you must perform before you begin to install the Cisco AS5200 and includes the following sections:
Follow these guidelines to ensure general safety:
Maintaining Safety with Electricity
Follow these guidelines when you work on equipment powered by electricity.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. ESD damage occurs when electronic components are improperly handled and can result in complete or intermittent failures.
Always follow ESD-prevention procedures when you remove and replace components. Ensure that the chassis is electrically connected to earth ground. Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the grounding clip to an unpainted surface of the chassis frame to safely ground unwanted ESD voltages. To guard against ESD damage and shocks, the wrist strap and cord must operate properly. If no wrist strap is available, ground yourself by touching the metal part of the chassis.
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.
The Cisco AS5200 can be placed on a desktop or mounted in a rack. The location of the Cisco AS5200 and the layout of your equipment rack or wiring room are extremely important for proper system operation. Equipment placed too close together, inadequate ventilation, and inaccessible panels can cause system malfunctions, shutdowns, and make maintenance difficult.
When planning your site layout and equipment locations, keep in mind the precautions described in the following section, "Preventive 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 might help you isolate the cause of failures and prevent future problems.
The following precautions help you plan an acceptable operating environment for your Cisco AS5200 and will help you avoid environmentally caused equipment failures:
The following tips will help you plan an acceptable equipment rack configuration:
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.
The Cisco AS5200 AC power supply includes the following features:
The Installation Checklist, Table 2-1, lists the procedures for initial hardware installation of a new router. Make a copy of this checklist and mark the entries as you complete each procedure. Include a copy of the checklist for each system in your Site Log. (See the following section, "Creating a Site Log.")
Table 2-1 : Installation Checklist
The Site Log provides a record of all actions relevant to the Cisco AS5200. 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 can include the following:
Preparing to Connect to a Network
When you set up your Cisco AS5200, consider distance limitations and potential electromagnetic interference (EMI) as defined by the Electronic Industries Association (EIA).
The dual T1 Primary Rate Interface (PRI) WAN card includes two RJ-48C ports. Cables are not included with the cards; however, port pinouts are listed in the section "Dual T1 PRI Card Port Pinouts" in the appendix "Cabling Specifications for the Cisco AS5200."
Table 2-2 lists the network specifications you should consider before connecting the dual T1 PRI card to a network.
Table 2-2 : Dual T1 PRI Card Network Specifications
Synchronous Serial Connections
The serial ports on the Cisco AS5200 are five-in-one synchronous serial 60-pin, D-type connectors. The synchronous serial ports (except the EIA-530) can be configured as data terminal equipment (DTE) or data communications equipment (DCE), depending on the attached cable. All DTE serial ports require that external clocking be provided by a data service unit/channel service unit (DSU/CSU) or other DCE device.
You must use a special serial cable to connect the Cisco AS5200 to a modem or DSU/CSU. This cable is available from Cisco and is usually ordered with the system. The cable uses a DB-60 connector on the chassis end. See the appendix "Cabling Specifications for the Cisco AS5200" for cable pinouts. For ordering information, contact a customer service representative.
As with all signaling systems, EIA/TIA-232 signals can travel a limited distance at any given bit rate; generally, the slower the data rate, the greater the distance. Table 2-3 shows the standard relationship between baud rate and maximum distance.
Table 2-3 : EIA/TIA-232 Speed and Distance Limitations
The use of balanced drivers allows EIA/TIA-449 signals to travel greater distances than the
Table 2-4 : EIA/TIA-449 Speed and Distance Limitations
The Ethernet attachment unit interface (AUI) port on the Cisco AS5200 is located on the rear panel of the chassis. Use the following equipment to connect to the Ethernet AUI port:
The connection to the AUI port can be attached using either a slide-latch or jackscrew connector.
The distance limitations for the IEEE 802.3 (10Base5 coaxial cable) specification indicate a maximum segment distance of 1640 feet (500 m) at a transmission rate of 10 Mbps.
Console and Auxiliary Port Considerations
The Cisco AS5200 includes an asynchronous serial console and auxiliary port. The console and auxiliary ports provide access to the Cisco AS5200 either locally (with a console terminal) or remotely (with a modem). This section discusses important cabling information to consider before connecting a console terminal (an ASCII terminal or 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 (RTS/CTS) 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.
The Cisco AS5200 includes an EIA/TIA-232 asynchronous serial console port (RJ-45). Depending on the cable and the adapter used, this port will appear as a DTE or DCE device at the end of the cable. Your router comes with cables and adapters to connect a console terminal (an ASCII terminal or PC running terminal emulation software) to the console port. To connect an ASCII terminal to the console port, use the RJ-45 roll-over cable with the female RJ-45-to-DB-25 adapter (labeled Terminal). To connect a PC running terminal emulation software to the console port, use the RJ-45 roll-over cable with the female RJ-45-to-DB-9 adapter (labeled Terminal). The default parameters for the console port are 9600 baud, 8 data bits, no parity, and 2 stop bits. The console port does not support hardware flow control. For detailed information about installing a console terminal, see the section "Connecting the Console Terminal and Modem" in the chapter "Preparing for the Cisco AS5200 Universal Access Server." See the appendix "Cabling Specifications for the Cisco AS5200" for cable and port pinouts.
The Cisco AS5200 includes an EIA/TIA-232 asynchronous serial auxiliary port (RJ-45) that supports flow control. Depending on the cable and the adapter used, this port will appear as a DTE or DCE device at the end of the cable. Your router comes with a cable and an adapter to connect a modem to the auxiliary port. To connect a modem to the auxiliary port, use the RJ-45 roll-over cable with the male RJ-45-to-DB-25 adapter (labeled Modem). For detailed information about connecting devices to the auxiliary port, see the section "Connecting a Modem to the Auxiliary Port" in the chapter "Installing the Cisco AS5200 Universal Access Server." See the appendix "Cabling Specifications for the Cisco AS5200" for cable and port pinouts.
The three pin alarm port is a future enhancement that will connect the Cisco AS5200 to an external audio, visual, or other alarm. The alarm port is not supported by current versions of the system software or the feature cards.
Do not unpack the Cisco AS5200 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 product, cables, Cisco Connection Documentation CD-ROM or printed publications, and any optional equipment you ordered might be shipped in more than one container. When you unpack each shipping container, check the packing list to ensure that you received all of the following items:
Inspect all items for shipping damage. If anything appears to be damaged, or if you encounter problems when you install or configure your system, contact a customer service representative.
Copyright 1988-1996 © Cisco Systems Inc.
Installation checklist for site______________________________________________
Cisco AS5200 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 Cisco Connection Documentation CD--ROM or printed documentation received
Chassis components verified
Initial electrical connections established
ASCII terminal or PC attached to console port
Signal distance limits verified
Startup sequence steps completed
Initial system operation verified
Software image verified
Description
Specification
Line rate
1.544 Mbps
Data rates
number x 56 or number x 64 Kbps, where number = 1 to 24
Standards
AT&T Pub. 62411, 54016, and 43801
ANSI T1.403
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
EIA/TIA232 standard. Table 2-4 lists the standard relationship between baud rate and the maximum distance for EIA/TIA-449 signals. These limits are also valid for V.35 and X.21.
Data Rate (Baud)
Distance (Feet)
Distance (Meters)
2400
4,100
1,250
4800
2,050
625
9600
1,025
312
19200
513
156
38400
256
78
56000
102
31
T1
50
15
