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Chapter 2

Setting Up the
GTS 205 and GTS 250


This chapter provides instructions for physically installing your GTS 205 and GTS 250. It includes the following topics:

Preparing for Installation

Verifying the Shipment

Placing Your GTS on a Table

Placing Your GTS in a Rack

Connecting the Cables

Connecting Your GTS to a Terminal

Powering on the GTS 205 and 250

Verifying Operation

Troubleshooting Checklist

Preparing for Installation

Before you install the GTS 205 or GTS 250, complete these tasks:

Note: Each GTS is programmed at the factory with a base MAC address in Ethernet order. If you have a unit with one or more Token Ring ports, the GTS converts the address to Token Ring order. However, Boot Options displays the address in Ethernet order.

Verifying the Shipment

Check the components included with your shipment against the list below. If anything is missing, contact your customer service representative.

Placing Your GTS on a Table

If you are using a table to support your GTS, do the following:

1. Attach the four adhesive-backed feet to the bottom of your GTS as shown in Figure 2-1.

Figure 2-1 Attaching the Feet to the Bottom of a GTS

2. Place your GTS on the table and go to Connecting the Cables.

Placing Your GTS in a Rack

You can mount your GTS in a standard 19-inch rack. To install your router in a rack, follow these steps for each mounting bracket:

1. Remove the outer screws that attach the mounting bracket to the side of the GTS as shown in Figure 2-2.

Figure 2-2 Removing the Screws on the Mounting Bracket

2. Turn the bracket so that the ear points away from the GTS. You can install the bracket so that the ear is toward either the back or front of the router. Install the bracket in the direction you want the router to face in the rack. Figure 2-3 shows the bracket at the back of the router.

Figure 2-3 Turning the Mounting Bracket

3. Use the screws that you removed previously to secure the bracket to the GTS.
4. Select the desired position for the GTS in the rack (front or rear).

Note: The GTS 250 is two EIA units in height, and the GTS 205 is one EIA unit in height.

5. Attach the GTS to the rack using mounting hardware appropriate for your rack.
6. If you want to attach the Cable Management Bracket to the rack, attach it using the same screw that you used to attach the Mounting Bracket to the rack as shown in Figure 2-4.

Figure 2-4 Attaching the Cable Management Bracket

Connecting the Cables

Table 2-1 describes how to connect the GTS to an Ethernet or Token Ring LAN and to a WAN.

Note: If you connect the GTS to a hub, wire center, or MAU (multistation access unit) that has management capabilities, make sure the port to which you connect is enabled.

Table 2-1 Network Connection Procedures

Ethernet
Note: Connect either an AUI or 10BaseT cable to the appropriate GTS Ethernet port. Do not connect cables to both the 10BaseT and AUI connector of an Ethernet port at the same time.

AUI Cabling
1. Attach the male connector end of the transceiver cable to the 15-pin female AUI connector on the GTS.
2. Attach the other end of the cable to the Ethernet transceiver or hub.
3. Check that the Ethernet transceiver is properly connected to the network.
Note: The GTS prefers the enabling of heartbeat on an Ethernet transceiver.

10BaseTCabling
1. Connect one end of the RJ-45 connector to the Ethernet 10BaseT connector on the GTS.
2. Connect the other end of the cable to a 10BaseT concentrator or hub.
Token Ring
Note: Connect either an STP or UTP cable to the appropriate GTS Token Ring port. Do not connect cables to both the STP and UTP connector of a Token Ring port at the same time.

STP Cabling
1. Connect the DB-9 connector to the STP port on the GTS.
2. Connect the other end of the cable to a lobe port on the Token Ring wire center or MAU.
UTP Cabling
1. Connect the RJ-45 connector to the UTP port on the GTS.
2. Connect the other end of the cable to a lobe port on the UTP wire center or MAU.
WANs
Note: To connect a WAN cable from the GTS to a modem or other DCE device, the DCE device must be full-duplex and provide clocking for both transmit and receive. Figure 2-5 shows various DTE/DCE connections.

Figure 2-5 WAN Connections

Table 2-2 describes how to connect the GTS 205 to an ISDN network.

Table 2-2 Connecting a GTS 205 to an ISDN Network

ISDN
Follow these steps to connect the GTS 205 to an ISDN network:

1. Connect the RJ-45 connector on the supplied ISDN cable to the RJ-45/ISO 8877 ISDN port on the GTS 205.
2. Connect the other end of the cable to an ISDN jack that provides an S/T interface. Make sure the ISDN jack is properly terminated according to ITU I.430.

Connecting Your GTS to a Terminal

You can access your GTS by connecting it to a terminal. You can use an ASCII terminal or a personal computer (PC) that has the appropriate terminal emulation software. The GTS supports any ASCII video terminal with the following capabilities:

Most ASCII terminal emulation programs are suitable and should be set to emulate a VT100 if possible.

You can also access your GTS remotely through a Telnet session.

Local or Remote Access

The following two figures show different ways to connect the GTS to a terminal, either directly, by using a null modem adapter
(
Figure 2-6), or remotely, by using a modem (Figure 2-7). Refer to your terminal or PC documentation for specific information on how to connect your terminal or PC.

Figure 2-6 Connecting the GTS Directly to a Terminal

Figure 2-7 Connecting the GTS Remotely to a Terminal

Connecting to a Modem Using a Service Port

To connect a GTS to a modem or other communications device as shown in Figure 2-7, do the following:

1. Attach the 9-pin connector on the supplied service port cable to a service port.
2. Connect the 25-pin connector on the other end of the cable to the modem or other communications device.
3. Configure the modem to auto-answer and to disconnect when the data terminal ready (DTR) signal drops.
4. Enable modem control on the router as either carrier-wait or ring-wait. You can enable modem control when you run Quick Config described in Chapter 3, or you can enable modem control by entering one of the following commands at the Config> prompt:

Additional Issues Involving the Use of a Modem

Connecting to a PC With a 9-pin Male DTE Serial Port

To connect your GTS directly to a PC that has a 9-pin male DTE serial port, provide a 9-pin female-to-female (DCE to DCE) null modem cable with the pinouts shown in Figure 2-8. Use the null modem cable to connect the PC to the service port on the GTS.

Figure 2-8 9-pin Female-to-Female (DCE to DCE) Null Modem Cable

Notes:

Connecting to a PC or Terminal With a 25-pin Male DTE Serial Port

Follow these steps to connect your GTS to a PC or terminal that has a 25-pin male DTE serial port:

1. Attach the 9-pin connector on the supplied service port cable to the GTS service port.
2. Connect the 25-pin connector on the other end of the cable to the supplied null modem adapter.
3. Plug the null modem adapter into the PC or terminal. You may need a 25-pin extension cord due to jack screw posts on the null modem adapter.

Connecting to a Terminal With a 25-pin Female DTE Serial Port

Follow these steps to connect the GTS to a terminal that has a 25-pin female DTE serial port:

1. Attach the 9-pin connector on the supplied service port cable to the GTS service port.
2. Connect the 25-pin connector on the other end of the cable to the supplied null modem adapter.
3. Use a straight-wired male-to-male 25-pin cable or gender changer to connect the null modem adapter to the terminal.

Configuring the Terminal

You must configure the terminal or your PC communications package as no parity, 8 bits/character, and 1 stop bit.

The GTS has an autobaud feature that senses the terminal's baud rate if the terminal is set to 1200, 2400, 4800, 9600, 19,200, or 38,400 bits per second.

To set the baud rate:

1. Set the terminal or PC communications program to the desired baud rate.
2. Press Break and then press any letter or number key or press Enter.
Note: Some terminal emulation software packages use a different key than Break to send a break message. See your software documentation for more information.

The GTS adjusts the baud rate on the service port to match the baud rate of the terminal. See Chapter 4 for more information on the baud rate, including how to set a fixed baud rate and how to set the baud rate to 300.

Powering on the GTS 205 and 250

Before you power on the GTS, note the following:

To power on the GTS, connect the power cord to the GTS. Plug the power cord into the outlet.

Verifying Operation

As soon as you plug in your GTS, POST (Power On Self Test) begins. During POST, the router's indicator lights light in various combinations. After POST, the GTS boots. POST and boot take about 1 minute. At the end of the boot, the green light for the system (OK) and for any active port should be lit or blinking. The port lights do not light for any port that is disabled (not being used).

When your router boots successfully for the first time, it immediately enters the Quick Configuration mode. See Chapter 3.

Errors During the Boot Process

If the GTS detects serious hardware errors during the boot process, it responds as follows:

Troubleshooting Checklist

Table 2-3 displays combinations of indicator lights that can indicate problems. These combinations of lights apply during operation. They do not necessarily indicate problems during the boot process. During Quick Configuration all port lights are off and the green OK (system) light is on.

Table 2-3 Troubleshooting Information

Problem Probable Cause Suggested Solution
No lights are lit.

The GTS is not receiving power.

Check that the power cord is firmly seated at both ends. Verify that your power outlet is good.

The OK (system) light is green, but a port light is amber.

The cables are not connected properly.

The attached communication equipment is not ready.

A port is not correctly configured.

If you are not using the port with the amber light lit, continue.

If you are using the port with the amber light lit, make sure the cable for that port is securely connected.

Ensure that the port configuration is correct, including the cable type setting.

The OK (system) light is green, but a port's lights
are not lit.

The port was disabled.

If you are not using the port, continue.

If you are using the port, enable the interface.

If the GTS displays any other abnormal combination of lights, contact your service representative.

If you locate the problem, execute POST again by unplugging the power cord from the wall outlet and then plugging it in again. See Chapter 5 for more information about running diagnostics on the GTS.



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