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Chapter 1

Connecting Your Router

You can order your GTX Series router either with the modules you want already installed, or you can order the modules separately and install them yourself. This guide supports both the GTX1000T and the GTX1500 routers. The difference between these two routers is that the GTX1500 has additional hardware that supports increased Virtual Private Networking (VPN) performance. (See Specifications on page 49.) You can follow the same procedures for installing and configuring both these routers.

This chapter provides the steps for setting up your router's hardware connections. See Appendix B for instructions on installing the optional modules.

Introduction

Before You Begin

What's Next?

Connecting to an Ethernet

Connecting to a PSTN

Connecting to a T1 Network

Connecting to an E1 Network

Connecting to a DDS Network

Connecting to a WAN

Connecting to an ISDN Line

Connecting to a PC

Plugging in the Power Supply

Introduction

 Your GTX Series router is a modular remote access router that supports a growing array of modules. Its back panel has a fixed slot and three configurable slots, which you can populate with a variety of modules.

For Local Area Network (LAN) communication . . .

You can install the Ethernet module in slot MD2.

Note: You can install this module only in MD2.

For Wide Area Network (WAN) communication . . .

You can install any of the following modules in slots MD1, MD2, and MD3.

For Integrated Services Digital Network (ISDN) communication . . .

You can install ISDN modules only in slot MD3.

The GTX Series router also has a fixed slot that contains three connectors:

The following figure shows a GTX Series router's back panel. It is only an example. You can populate the three configurable slots (MD1, MD2, and MD3) in a variety of ways.

The following three figures illustrate the other available modules.

Before You Begin

You need a PC with terminal emulation software or a VT100 Terminal to configure your router for the first time and, depending on the modules installed in your particular GTX Series router, you need the following cables.
To connect to... You need...
Ethernet

 Ethernet 10BaseT (Unshielded Twisted Pair) straight-through cable and/or Ethernet 10BaseT crossover cable. (Not supplied.)

Console

 Console null-modem cable with adapter to connect a PC or terminal to your router. (Supplied with your router.)

Modem module

 Telephone cable for connecting to the telephone line. (Not supplied.)

WAN module

 The appropriate serial WAN cable(s).

GTX Series routers only support OpenROUTE Networks WAN cables. See Selecting a WAN Cable on page 14 for a list of WAN cables.

ISDN module

 RJ-45 8-conductor straight-through cable. (Not supplied.)

An external NT1 device if you are using an ISDN S/T module.

The appropriate cable to connect the NT1 to the ISDN wall jack. The cable for this connection depends on the NT1 device.

POTS module

 RJ-11 cable for connecting to the attached device. (Not supplied.)

56K DDS CSU/DSU module

 RJ-48S 8-conductor straight-through cable. (Not supplied.)

Ethernet module

 Ethernet 10BaseT (Unshielded Twisted Pair) straight-through cable. (Not supplied.)

Fractional T1 CSU/DSU module

 Cable with an RJ-48C connector (TIA 568B compatible). (Not supplied.)

Fractional E1 module

 Cable with an RJ-48C connector (TIA 568B compatible). (Not supplied.)

What's Next?

The following sections show how to connect your router to

Connecting to an Ethernet

 There are two ways to connect your GTX Series router to an Ethernet:

Using the Fixed Ethernet Connector

 If you are using the Ethernet connection in the fixed slot on your router's back panel,

1. Connect one end of an Ethernet 10BaseT (UTP) straight-through cable to the ETH connector in the router's fixed slot.

2. Connect the other end of the cable to an Ethernet 10BaseT hub.

Using the Ethernet Module

Note: You can install this module only in slot 2 (MD2) on your router.

1. Connect one end of the 10BaseT cable to the Ethernet connector on the Ethernet module.

2. Connect the other end of the cable to an Ethernet 10BaseT hub.

3. Set the PC/Hub crossover switch on the module to HUB.

Connecting to a PSTN

 If you have a Modem module (either the 33.6 Kbps or the 56 Kbps) installed in your router, do the following to connect to the analog public switched telephone network (PSTN).

1. Connect one end of the RJ-11 telephone cable to the TEL jack on the router's Modem module and the other end to your telephone.

2. Connect one end of the RJ-11 telephone line cable to the LINE jack on the router's Modem module and the other end to the telephone line's RJ-11 wall jack.

To communicate over the telephone line, dial the telephone number of the destination as usual.

Notes:

Connecting to a T1 Network

 If you have the T1 CSU/DSU module installed in your router, do the following to connect to a T1 network:

1. Connect one end of the unshielded twisted pair (UTP) RJ-48C cable to the T1 connector on the router's T1 module.

2. Connect the other end of the cable to an RJ-48C network interface jack provided by your service provider.

Connecting to an E1 Network

If you have the E1 module installed in your router, do the following to connect to an E1 network:

1. Attach one end of a grounding wire to the GND (ground) on the E1 module and then attach the other end to a ground. (Optional)

2. Connect one end of the unshielded twisted pair (UTP) RJ-48C cable to the E1 connector on the router's E1 module.

3. Connect the other end of the cable to the service provider's network interface box.

Connecting to a DDS Network

If you have the DDS CSU/DSU module installed in your router, do the following to connect to a leased-line DDS network:

1. Connect one end of the unshielded twisted pair (UTP) RJ-48S cable to the CSU/DSU connector on the router's DDS CSU/DSU module.

2. Connect the other end of the cable to an RJ-48S network interface jack provided by your service provider.

The following figure shows the connection between the router's DDS DSU module and a DDS network.

Connecting to a WAN

To connect your router to the Internet or another WAN using a WAN interface module, use Point-to-Point Protocol (PPP) over either a dedicated (leased) or a dialup telephone line or use a Frame Relay network.

To connect the router to a PPP WAN,

1. Connect the router to an external modem.

You must purchase the appropriate cable from an OpenROUTE Networks vendor. See Selecting a WAN Cable on page 16.

Note: The GTX Series routers support both asynchronous and synchronous modems.

2. Connect the modem to the telephone line with an RJ-11 cable.

To connect the router to a Frame Relay WAN,

1. Connect the router to an external Channel Service Unit/Digital Service Unit (CSU/DSU).

You can purchase the appropriate cable from OpenROUTE Networks. See Selecting a WAN Cable on page 16.

Note: The GTX Series routers work with any of the major CSU/DSU products on the market.

2. Connect the CSU/DSU to the Frame Relay switch.

Selecting a WAN Cable

The type of WAN cable you use depends on the interface type that the equipment you connect to supports. To connect to a device that has a Data Communications Equipment (DCE) connector, use a Data Terminal Equipment (DTE) cable. To connect to a device that has a DTE connector, use a DCE cable.

To be sure that you are using the proper cable to connect your WAN module, check the part number on the cable with the information in the following table.
To connect a GTX Series router to . . . Use cable type . . . Part Number
an external asynchronous modem.

 RS-232 DTE

 P4730-09

an external synchronous modem, a modem eliminator, or a CSU/DSU.

(Whether you use RS-232, V.35, or X.21, depends on which type of communication the equipment you connect to supports.)

RS-232 DTE

V.35 DTE

X.21 DTE

 P4730-09

P4730-08

P4730-10

another router that has a DTE connector. (In this case, you must set up the router to provide clocking.)

(Whether you use RS-232, V.35, or X.21, depends on which type of communication the equipment you connect to supports.)

RS-232 DCE

V.35 DCE

X.21 DCE

 P4730-12

P4730-11

P4730-13

Note: To connect the router to a modem or CSU/DSU, the modem or device must be full-duplex and provide clocking for both transmitting and receiving.

The following three figures show possible DTE/DCE connections.

Connecting to an ISDN Line

How you make the connection from your router to an ISDN line depends on whether your ISDN module is an ISDN U or ISDN S/T module. Check the router's back panel to identify the ISDN module installed in the router.

ISDN U Module

Note: You can install this module only in slot 3 (MD3) on your router.

 The ISDN U module has a built-in Network Termination (NT1) device. The NT1 provides the power and function for operating the ISDN line. When you use the ISDN U module, you cannot use any other ISDN device on the ISDN line.

1. Connect one end of the RJ-45 ISDN cable to the RJ-45 ISDN connector on your router.

2. Connect the other end of the ISDN cable directly into an ISDN wall jack.

CAUTION:

An RJ-11 cable, used with a regular analog telephone, can also be used to connect the
GTX Series router to the ISDN wall jack. OpenROUTE Networks discourages using an
RJ-11 cable for this purpose, however, because
you may inadvertently plug the router into a
normal telephone jack rather than into an ISDN
wall jack. This can damage the router.

ISDN U with POTS Module

Note: You can install this module only in slot 3 (MD3) on your router.

 Your connections for the ISDN portion of this module are the same as for the ISDN U module. See ISDN U Module on page 19.

You can also connect analog telephone devices (such as a telephone or FAX machine) to the telephone (POTS) connections on this module.

1. Connect one end of a telephone cable to your telephone device.

2. Connect the other end of the cable to one of the TEL connectors on the module.

ISDN S/T Module

Note: You can install this module only in slot 3 (MD3) on your router.

 The S/T module does not have a built-in NT1 device. You must provide an external NT1 device on the ISDN line. A typical NT1 device looks like a small modem and has S/T port(s) and a U interface on the back of it.

The ISDN S/T module can co-exist with other ISDN equipment using the same ISDN line.

1. Connect one end of the RJ-45 ISDN cable (not supplied with your router) to the RJ-45 ISDN connector on the router.

2. Connect the other end of the ISDN cable to the S/T port on the NT1 device.

3. Set the S/T terminator switch on the ISDN module to the appropriate position. See Setting the S/T Switch on page 22.

4. Connect one end of an ISDN cable to the NT1 U interface port and the other end to the ISDN wall jack. The ISDN cable for this connection is dependent on your NT1 device.

Setting the S/T Switch

There is an S/T switch on the back of the router's S/T module. You can slide the switch to 0 or 1. Setting the switch to 0 means that no terminating resistor is in use. Setting the switch to 1 means that the router's S/T module terminates the ISDN cable with a 100-ohm resistor.

For point-to-point connections (shown in the following figure), set the switch to 1. For all other configurations, consult your NT1 manual for the proper setting. In a point-to-point connection, there is one ISDN device on an ISDN line.

ISDN S/T with POTS Module

Note: You can install this module only in slot 3 (MD3) on your GTX Series router.

 Your connections for the ISDN portion of this module are the same as for the ISDN S/T module. See ISDN S/T Module on page 21.

You can also connect analog telephone devices (such as a telephone or FAX machine) to the telephone (POTS) connections on this module.

1. Connect one end of a telephone cable to your telephone device.

2. Connect the other end of the cable to one of the TEL connectors on the module.

Connecting to a PC

To connect a PC or terminal locally to the router, use the 9-pin to 9-pin null modem cable supplied by OpenROUTE Networks and, if needed, the 9-pin to 25-pin adapter. The following figure shows how to connect a PC or terminal directly to the router.

1. Connect one end of the null-modem cable to the Console connector on the back panel of your router.

2. Connect the other end of the cable to your PC.

Plugging in the Power Supply

There is a +5V connector on the back panel of your router.

1. Connect the DC jack end of the cord on your 5V DC power supply to the 5V DC connector on the back of your router.

2. Connect one end of your power cord into the AC receptacle on the power supply.

3. Plug the power cord into the wall outlet.


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