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90000583-A
User Manual
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Digi 90000583-A User Manual

User Guide
Digi TS Family
Digi One TS, Digi One TS Wireless, Digi One RealPort, Digi One RealPort Wireless, PortServer TS 2/4,
PortServer TS 2/4 MEI, PortServer TS 2/4 Wireless, PortServer TS 1/3 + Modem, and PortServer TS 8/16
90000583_A
Digi International Inc. 2004. All Rights Reserved.
90000583_A
Contents
Chapter 1 Introduction
About This Guide...................................................................................7
Purpose .............................................................................................................. 7
Audience............................................................................................................. 7
Scope ................................................................................................................. 7
Other Documents in the Library.............................................................7
Quick Start Guide ............................................................................................... 7
Digi Command Reference .................................................................................. 7
RealPort Setup Guides....................................................................................... 7
Online Help for the Web UI................................................................................. 7
Setup Overview.....................................................................................8
Step A: Plan........................................................................................................ 8
Step B: Set Up the Hardware ............................................................................. 8
Step C: Install and Setup Digi Port Authority-Remote........................................ 8
Step D: Configure an IP Address ....................................................................... 8
Step E: Configure Ports...................................................................................... 8
Step F: Configure Other Features as Required.................................................. 9
Supported Devices................................................................................ 9
About Configuration Methods................................................................9
Configure the Digi Device with the Wizard ......................................................... 9
Configure the Digi Device from an Attached Terminal ....................................... 9
Configure the Digi Device from a Telnet Session............................................... 9
Configure the Digi Device from the Web Interface ............................................. 9
Downloading a Configuration File..................................................................... 10
Accessing the Configuration from the Web Interface..........................10
Quick Find Table.................................................................................10
Chapter 2 Configuring the IP Address
Options for Configuring the IP Address and Mask..............................13
Device Support: Digi Port Authority-Remote and ARP-Ping for IP Address
Configuration .................................................................................................... 13
Configuring the IP Address with Digi Port Authority-Remote ..............14
Assumptions..................................................................................................... 14
Procedure......................................................................................................... 14
Configuring the IP Address Using ARP-Ping.......................................14
Assumptions..................................................................................................... 14
Procedure......................................................................................................... 15
Configuring an IP Address using DHCP and RARP............................15
About DHCP and RARP................................................................................... 15
Procedure......................................................................................................... 15
Accessing the Digi Device...................................................................15
Chapter 3 Configuration
Network Settings.................................................................................17
Procedure for Using a Name Server ................................................................ 18
Configuring the Serial Ports.................................................................19
Contents 3
Port Profiles.........................................................................................21
RealPort............................................................................................................ 21
Console Management ...................................................................................... 21
TCP Sockets . ...... ....... ...... ....... ...... ...... ....... ...... ....... ...... .................................... 22
UDP Sockets .................................................................................................... 22
Serial Bridging .................................................................................................. 23
Printer............................................................................................................... 24
Terminal............................................................................................................ 24
Industrial Automation........................................................................................ 25
Modem Profiles................................................................................................. 25
Modem Emulation............................................................................................. 26
Modem.............................................................................................................. 26
Power Management ......................................................................................... 27
Custom ............................................................................................................. 28
User Configuration...............................................................................29
Common User Features ................................................................................... 29
Security Configuration.........................................................................30
Procedure......................................................................................................... 30
System Configuration..........................................................................31
PPP Settings ...... ....... ...................................... ....... ...... ....... ...... ....... ...... .......... 31
About Autoconnection.........................................................................33
Configuring a Port for Autoconnection.................................................33
Configuring a User for Autoconnection................................................34
Chapter 4 Setting Up RealPort
About RealPort....................................................................................35
What is RealPort?............................................................................................. 35
RealPort Advantages........................................................................................ 35
Configuring the RealPort Software................................................................... 35
Chapter 5 Special Features: Wireless
Configuration Considerations..............................................................37
Using Ethernet.................................................................................................. 37
Chapter 6 Special Features: Embedded Modem
Embedded Modem..............................................................................41
Installing the PortServer TS 1/3 + Modem........................................................ 41
Configuring the PortServer TS 1/3 + Modem ................................................... 41
Chapter 7 Special Features: Modem Emulation
Modem Emulation................................................................................43
Modem Emulation Cable Signals........................................................44
Scenarios for Modem Emulation............................................. ..... .... ...45
Outgoing Modem Emulation Connection.......................................................... 45
Incoming Modem Emulation Connection.......................................................... 45
Modem Emulation Pooling................................................................................ 45
Modem Emulation Bridge ................................................................................. 45
Originating, Answering, and Disconnecting Calls................................45
Disconnecting Calls-Digi Device Server........................................................... 46
Modem Emulation AT Command Set..................................................46
4 Contents
S-Registers..........................................................................................52
Result Codes.......................................................................................57
Chapter 8 Special Features: Power Over the Serial Ports
Serial Power Feature...........................................................................59
Configuring RI Power..........................................................................59
RI Power In....................................................................................................... 59
RI Power Out.................................................................................................... 60
Configuring DTR Power.......................................................................60
Power Out......................................................................................................... 60
Serial Power Table..............................................................................61
Chapter 9 Special Features: IA (Industrial Automation)
Configuring Industrial Automation with Modbus..................................63
Chapter 10 Special Features: SNMP
About SNMP and the Device Server Agent.........................................65
Network Management Components................................................................. 65
SNMP Management Agent..................................... ...... ....... ...... ....... ...... .......... 65
SNMP Traps.................... ....... ...... ...... ....................................... ....... ...... ....... ... 65
MIB Support...................................................................................................... 65
Message Support ............................................................................................. 66
Supported Traps............................................................................................... 66
Configuration Procedure: Web Interface.............................................66
Chapter 11 Configuration Management
Upgrading the Firmware......................................................................67
HTTP or TFTP Upgrade Procedure.................................................................. 67
Copying the Configuration to and from a Remote Host.......................67
When To Use Remote Configuration................................................................ 67
Download Procedure ........................................................................................ 67
TFTP Procedure............................................................................................... 68
Resetting Configuration to Defaults.....................................................68
Chapter 12 Reference and Certifications
Interpreting the LEDs...........................................................................69
LEDs................................................................................................................. 69
LED Diagnostics............................................................................................... 69
Device EIA 232/422/485 Switch Settings ......................................................... 70
RJ-45 Pinouts................................................................................................... 70
Safety Statements...............................................................................70
PortServer TS 8/16........................................................................................... 70
Rack Mounting Installation (PortServer TS 16 Rack and DC Rack)................. 71
PortServer TS 1/3 + Modem............... ....... ...... ....................................... ....... ... 71
Specifications......................................................................................72
PortServer TS 8/16........................................................................................... 72
Digi One TS Wireless, PortServer TS 2/4 Wireless.......................................... 73
PortServer TS 2/4 MEI, Digi One TS.. ....... ...... ....... ...... .................................... 74
PortServer TS 2/4............................................................................................. 74
PortServer TS 1/3 + Modem............... ....... ...... ....................................... ....... ... 75
Contents 5
Regulatory Notices..............................................................................76
Certifications........................................................................................78
FCC Part 15 Class A (PortServer TS 8).......................................................... 78
Radio Frequency Interference (RFI) (FCC 15.105) .......................................... 78
Labeling Requirements (FCC 15.19)................................................................ 78
Modifications (FCC 15.21)................................................................................ 78
Cables (FCC 15.27).......................................................................................... 78
ICES 003 Class B ( Digi One TS, Digi One TS Wireless, PortServer TS 2/4, PortServer TS 2/4 MEI, PortServer TS 2/4 Wireless,
PortServer TS 16).............................................................. 78
Antennae (Wireless only) .......................... ...... ....... ...... ....... ...... ....... ................ 78
Maximum Permissible Exposure (Wireless only) ............................................. 79
Declaration of Conformity................................................................................. 79
Digi Contact Information......................................................................80
6 Contents
Chapter 1

About This Guide

Introduction

Purpose

This user guide provides the following:
• Configuration and administration procedures
• Configuration examples

Audience

This guide is intended for the person responsible for configuring and administering device server. It assumes that this person has experience configuring network devices and is familiar with networking concepts.

Scope

This guide provides step-by-st ep instructions for configuring and administering your Digi device’s main features. It focuses on performing these tasks through the Web user interface. It does not address how to configure ever y option, provide complete inf ormation on commands, or discuss hardware installation. These topics are covered in other documents in the Digi library.

Other Documents in the Library

Related documents in the library include:

Quick Start Guide

The guide that comes in the package with the Digi device coverin g t he first steps necessary to get your device up and running.

Digi Command Reference

This online manual, available on the Software and Documentation CD, provides complete information on commands.

RealPort Setup Guides

These online manuals provide information on setting up servers for RealPort software.

Online Help for the Web UI

This context-sensitive online help provides information on configuration fields used wi th web browser co nfiguration int erface.
Chapter 1 Introduction 7

Setup Overview

Following is an overview of the process for setting up a device in the Digi TS family of devices for use. The rest of this guide provides details on each step of the process.

Step A: Plan

Before beginning setup, consider the following:
• How to assign an IP address to the Digi device’s Et hern et i nt erface , which can be accomplished in a number o f ways. See "Configuring the IP Address" on page 13.
• How to configure serial ports. A key consideration is whether to use RealPort. Other considerations include the type of peripheral t hat will connect to the port and the peripheral’s cabling requirements. See "Setting Up RealPo r t" on p a ge 35 and the online RealPort driver documentation and Cable Guide, both of which are on the Software and Documentation CD.
• The various ways in which your Digi device can be configured. See "About Configuration Methods" on page 9 for more information.

Step B: Set Up the Hardware

1. If the Digi device supports multiple serial port interfaces (EIA-232, EIA-422/485), set the interface with the dip switches on the device.
2. Connect the device to the network.
3. Connect peripherals to serial ports. See the Cable Guide on the Software and Documentation CD.
4. Connect the power supply to the Digi device.

Step C: Install and Setup Digi Port Authority-Remote

Digi Port Authority-Remote is a utility that provides one of the ways to configure an IP address and also provides port monitoring.

Step D: Configure an IP Address

There are a number of ways to configure an IP address. See "Configuring the IP Address" on page 13 for more information.

Step E: Configure Ports

See the following for mo re information:
• "Setting Up RealPort" on page 35
• "Network Settings" on page 17
8 Chapter 1 Introduction

Supported Devices

Step F: Configure Other Features as Required

See the following for information on setting up other features:
• "PPP Settings" on page 31
• "Configuring Autoconnection" on page 43
• "Configuring IP Routing" on page 47
• "Configuring S ec urity Features" on page 49
• "Special Features:Domain Name Sy stem (DNS)" on page 63
This manual prov ides information on the following Digi devices:
• Digi One TS, Digi One TS H (high temperature), and Digi One TS
Wireless
• PortServer TS 1/3 + Modem
• PortServer TS 2/4, PortServer TS 2/4 MEI, PortServer TS 2/4 H,
PortServer TS 2/4 MEI H, and PortServ er 2/4 Wireless
• PortServer TS 8/16, PortServer TS 16 Rack, PortServer TS 16 DC
Rack

About Configuration Methods

Use this section to learn about the different configuration methods.

Configure the Digi Device with the Wizard

Simply follow the prompts and choose your configuration with the wizard. Choose either a Microsoft Windows or Unix platform.

Configure the Digi Device from an Attached Terminal

With this method, you cable a terminal or PC running terminal emulation software to a device server port and then use the command line to enter commands. This method allows you to configure a ll features. It requires, however, that you and the device server be in the same location. Some users find it advantageous to configure the device server IP address this way and then u se one of the othe r met hods for t he rest of the configu ration .

Configure the Digi Device from a Telnet Session

With this method, you Telnet to the device server and use the command line to complete configuration tasks. The only disadvantage to this method is that you have to configure the device server with an IP address before you can Telnet to it.

Configure the Digi Device from the Web Interface

The great advantage to this method is ease of use. This method requires that you configure the IP address before you can access the configuration from the web interface, however, some features cannot be configured this way.
Chapter 1 Introduction 9

Downloading a Configuration File

With this method, you configure a Digi device and then do the following:
1. Download an existing configuration file to a host system.
2. Edit the file with specific configuration using a text editor.
3. Upload the file to the device server.
This an excellent method for maintaining highly similar configuration files for multiple Digi devices. The disadvantage is that the device server requires some configuration steps, such as the IP address, to be completed before it can be used.

Accessing the Configuration from the Web Interface

To access the configuration from the web interface, follow these steps. This procedure assumes that you have configured the Digi device with an
IP address already. See "Configuring the IP Address" on page 13.
1. Access the Digi device from a web browser by specifying the device server’s IP address in the URL window.
2. Log on as root. The default password is dbps.

Quick Find Table

The following table is a quick reference for specific features and where to find the web interface configuration procedures.
The Digi TS Family includes the following devices:
• Digi One TS (and high temperature models )
• Digi One TS Wireless
• PortServer TS 2 (and high temperature models)
• PortServer TS 4 (and high temperature models)
• PortServer TS 2 MEI (and high temperature models)
• PortServer TS 4 MEI (and high temperature models)
• PortServer TS 2 Wi reless
• PortServer TS 4 Wi reless
• PortServer TS 1 + Modem
• PortServer TS 3 + Modem
• PortServer TS 8
• PortServer TS 16 (and Rack models)
Feature Products Availability Configuration Details
RealPort Digi TS Family
Serial Port > Por t Profile > RealPort
Digi One TS Wireless
Wireless
10 Chapter 1 Introduction
Digi One RealPort Wireless PortServer TS 2/4 Wireless
Network > Wireless LAN Settings
Feature Products Availability Configuration Details
Digi One TS PortServer TS 2/4 MEI
Modem Emulation
PortServer TS 2/4 Wireless PortServer TS 1 + Modem PortServer TS 3 + Modem PortServer TS 8/16
Serial Port > Por t Profile > Modem Emulation
Embedded Modem
AutoConnection Digi TS Family
IP Routing PortServer TS 8/16
Access Control Digi TS Family
DNS Digi TS Family System > System Name
Industrial Automation (IA)
Power Over Serial Port
PortServer TS 1 + Modem PortServer TS 3 + Modem
Digi One TS PortServer TS 2/4 MEI PortServer TS 2/4 Wireless PortServer TS 1 + Modem PortServer TS 3 + Modem PortServer TS 8/16
Digi One TS Wireless Digi One RealPort Wireless PortServer TS 2/4 Wireless PortServer TS 2/4 MEI
Serial Port > Por t Profile > Internal Modem
Serial Port > Por t Profile >TCP Sockets
Serial Port > Port Pr ofile > IA > Serial Master > Packet Routing
User > New User > determine access
Serial Port > Por t Profile >Industrial Automation
See "Special Features: Power Over the Serial Ports" on page 59
PPP Digi TS Family System > PPP
SSH V ersion 2
TCP Socket Communication
UDP Multicast Communication
RADIUS PortServer TS 8/16 Security > RADIUS
Power Management
Chapter 1 Introduction 11
PortServer TS 2/4 MEI PortServer TS 8/16
Digi TS Family
Digi TS Family
PortServer TS 2/4 MEI PortServer TS 2/4 Wireless PortServer TS 8/16
Network > Security > Custom
Serial Port > Por t Profile >TCP Sockets
Serial Port > Por t Profile >UDP Sockets
Serial Port > Por t Profile >Power Management
12 Chapter 1 Introduction
Chapter 2

Configuring the IP Address

The next step in the device configuration process is to configure an IP address and access the device for more advanced configurations. You must set the initial IP before you can use the web interface. Once the IP is set, the device can be accessed through the web interface and any changes made including cha ngin g the IP add ress.

Options for Configuring the IP Address and Mask

The device server IP address can be configured using the following methods:
• With the Wizard from the Software and Documentation CD. (Insert
the CD and the wizar d auto mati cally po p s up f or Micr osof t Window s systems. If you have a UNIX system see the back of the quick start guide for mounting instructions.)
• With Digi Port Authority-Remote, a Digi utility on the Software and
Documentation CD.
• From the command line, using the set config command. See the
Digi Command Reference for more details.
• By updating the ARP table on a server and then pinging the Digi
device (called ARP-Ping, see "Configuring the IP Address Using ARP-Ping" on page 14).
• Using a DHCP server ("Configuring an IP Address using DHCP and
RARP" on page 15.)
• Using a RARP server ("Configuring an IP Address using DHCP and
RARP" on page 15.)
The IP address and mask can also be changed using the web interface, but not for initial IP address configuration.

Device Support: Digi Port Authority-Remote and ARP-Ping for IP Address Configuration

Not all Digi devices can use Digi Port Authority-Remote and ARP-Ping for IP address configuration. To determine if you can use these features, find the hardware label on your Digi device and then use the table below to determine whether this feature is available:
Device Part Number Revision Required
Digi One IA RealPort 50000764-01 F or higher Digi One RealPort 50000723-01 J or higher PortServer TS 2 50000723-02 J or higher PortServer TS 4 50000723-03 G or higher
Chapter 2 Configuring the IP Address 13

Configuring the IP Address with Digi Port Authority-Remote

Use this section to configu re an initial IP add ress, subnet mask, and defau lt gateway using Digi Por t Autho rit y-Re mote. Thi s proce dure cannot b e used to change the IP address, but only to assign the initial IP address. It also cannot be used if a DHCP server is act i ve.

Assumptions

This procedure assumes the following:
• That your Digi device supports this feature. See "Device Support:
Digi Port Authority-Remote and ARP-Ping for IP Address Configuration" on page 13.
• That your Dig i device is connected to the Ethernet network.
• That the Digi device has DHCP client turned on. This is the default
setting and it will be on unless it was turned off.
• That you do not have a DHCP server to serve IP ad dress. If you d o,
use the DHCP procedure. See "Configuring an IP Address using DHCP and RARP" on page 15.
• That you have installed Digi Port Authority-Remote version 2.01.11
or later. Click the Help button on the tool bar in Digi Port Authority­Remote to check the version number.

Procedure

1. Run Digi Port Authority-Remote.
2. Click Discover. A list of Digi devices appears. Systems with IP addresses of 0.0.0.0 nee d IP addresses.
3. Select a device from the list and then click Configure.
4. Supply an IP address, subnet mask, and default gateway and then choose OK.
Digi Port Authority-Remote configures the IP address, subnet mask, and default gateway.

Configuring the IP Address Using ARP-Ping

An IP address can be configured by manually updating a server’s ARP table and then pinging the Digi device.
Note: The ARP-Ping command assigns the IP address you designate but also
assigns default subnet mask and gateway addresses. It is necessary to change the subnet mask and gateway addresses.

Assumptions

This procedure assumes the following:
• That your Digi device supports this feature. See "Device Support:
Digi Port Authority-Remote and ARP-Ping for IP Address Configuration" on page 13.
• That your Dig i device is connected to the Ethernet network
14 Chapter 2 Configuring the IP Address

Procedure

1. Record the MAC address of th e Digi device. The MAC addr ess is on the back of the unit.
2. Access a server on the same subnet as the Digi device.
3. Manually updat e the server’s ARP table using the Digi device’s MAC address and the IP address you want assigned to the Digi device. The following is an example of how this is done on a Windows NT 4.0 system:
arp -s 143.191.2.1 00-00-9d-22-23-60
4. Ping the Digi device using the IP address just assigned. The following is an example:
ping 143.191.2.1
The ping will probably time out before there is a response from the Digi device.
5. Wait several seconds and then ping the Digi device again. The Digi device replies to the ping, indicating that the IP address has
been configured.

Configuring an IP Address using DHCP and RARP

About DHCP and RARP

When the device server boots, it transmits a DHCP request and a RARP request. This continues until an address is assigned.

Procedure

To use RARP or DHCP follow these steps:
1. Set up an entry for an address on a DHCP or RARP server. If you intend to use RealPort, do the following:
• Reserve a permanent IP address.
• Record the IP address. You will need it when you configure the
2. Power on the device server.
The DHCP or RARP server assigns the device server an IP address.

Accessing the Digi Devi ce

1. Enter the IP address in the URL bar of your browser.
2. Enter your login name (root) and password (dbps).
Note: The following screen appears allowing you to configure the device for your
RealPort driver.
specific needs. A tutorial is available to guide you in your decisions. The Help
Chapter 2 Configuring the IP Address 15
button in the upper right corner is also available.
From the web interface, you make any changes you need for your configuration. Remember to click Apply to save your changes and Reboot when you are ready for the changes to take effect.
16 Chapter 2 Configuring the IP Address
Chapter 3

Network Settings

Configuration

The next step in the device setup process is to configure the network and serial port settings. In order t o access the web in te rfa c e an IP addre ss must be assigned. It is assumed you have logged onto the web interface using the username, root and password, dbps in order to make any changes or additional configuration assignments. However, it is important to note that if you have used the wizard, your configuration is complete and you do not additional changes.
1. Click Network to view the IP settings or make any changes to the IP address.
2. Click Advance Network Settings.
Chapter 3 Configuration 17
Adjust the network settings to fit your configuration needs. If you need additional information use the Help button on the top right hand corner of the configuration screen.
3. Click Apply to save any changes you make.
4. Click Reboot for changes to take effect.

Procedure for Using a Name Server

To configure a DNS server, follow these steps:
1. Click Network and select Use the following IP address.
2. Enter the IP address for the DNS server in the Name Server box. The DNS server maps names (MyDeviceName.mycompany.com) to IP addresses (192.105.1.2).
3. Enter a name for a group of network devices.
4. Enter the domain name that this device will live in and is tied to the DNS server address assigned in step 2. This name can be used by other network devices to talk to it, instead of using the its IP address. Get this name from the network administrator, because it must be entered in the DNS server to work properly.
5. Enter the Base Socket. The base socket is the incoming port number which remote devices need to use to access the device using the named protocols.
Note: Base Socket
This determines which network port (socket) on this Digi terminal server another network device (such as another Digi terminal server or a PC) uses to communicate using certain services. Most applications can leave this value unchanged. To calculate these settings: Telnet port = Base Socket + Serial Port Number Raw port = Base Socket + 100 + Serial Port Number
18 Chapter 3 Configuration
raw (TCP or UDP) 2000 2101
6. Click Apply.
7. Click Reboot for changes to take effect.

Configuring the Serial Ports

1. Click Serial Ports under Configuration.
Service Ba se Sock et Network Port
telnet 2000 2001
2. Click the port number that you want to configure.
3. Click Change Profile and select a profile based on the device you have connected to your port.
Note: The following section shows the settings available for each profile.
Chapter 3 Configuration 19
Note: The ‘More’ link will describe the profiles with additional information.
Note: Profiles appear depending on your device. Naturally, if you do not have a
device capable of a specific profile such as Power Management or Wireless, you will not have that particular profile available.
4. Click Apply to save the profile. The interface will determine any additional settings and advise you what tab to click next. See "Port Profiles" on page 21 or click Help for additional information.
5. A port profile or port options page will come up and ask for additional parameters if needed. Enter the appropriate parameters and click Apply.
6. Click Reboot for changes to take effect.
20 Chapter 3 Configuration

Port Profiles

Each port profile determines the setti ngs nee de d. The fol low i ng screenshots of each profile show the port settings. For a complete description of each profile click the Help button.

RealPort

Installed on a network-based PC, Rea l Port emulates a serial port. That is, the application “t hinks” it is working with a real serial port, such as COM1. When the applicatio n sends dat a to this serial port, RealPor t ship s the data across the network to the device server which in turn routes it to the serial device. This is also referred to as COM Port Redirection. The network is transparent to both the application and the device.

Console Management

Access a device's console port over a network connection. Most network devices such as routers, switches, and servers offer serial port(s) for management. Instead of connecting a terminal to the console port, ca ble the console port to the serial port of your Digi device. Then using TCP/IP utilities like reverse telnet, network administrators can access these consoled serial ports from the L AN.
Chapter 3 Configuration 21

TCP Sockets

TCP socket communication enables serial devices to communicate with each other over an Ethernet network as though they were connected by a serial cable.
Configuring TCP socket communications involves configuring the Digi device for the following types of c onnections:
• Inbound connections, that is, connections that are initiated by the
device on th e other side of the network.
• Outbound connection, that is, connections that are initiated by the
device connected to the serial port.
Note: TCP Sockets profile is also the profile to use for Autoconnection. See "Click

UDP Sockets

Reboot for changes to take effect." on page 33 for more information.
The Digi TS Family devices are capable of UDP multicast. UDP multicast is used to send serial dat a over an Et hernet cable to one or many host s at the same time. UDP is a ‘connectionless’ protocol, meaning UDP does not need a protoc ol , b ut i s se nding data wi thout any form of acknowledgement or error correction. Up to 64 devices can receive a UDP multicast at one time. Both the transmitting and receiving devices must be configured properly for UDP multicast to work.
Configuring UDP multicast communications involves configuring the D i gi device for the following types of c onnections:
• Inbound connections, that is, connections that are initiated by the
device on th e other side of the network.
• Outbound connection, that is, connections that are initiated by the
device connected to the serial port.
22 Chapter 3 Configuration
Note: The serial parameters for two connecting devices must match meaning if one
device is set for 9600 bps, the other device must be set for the same rate.

Serial Bridging

A serial bridge is a network connection between two serial devices, each of which uses a device server. The serial devices “think” they are communicating wit h each other across a serial cable using serial communication techniques. There is no need to reconfigure the server or the serial device. Neither is aware of the intervening network.
This profile configures each side of the bridge separately. Repeat the configuration for the secon d Dig i device se rve r o f the bridge sp eci fyi ng the IP address of the first Digi device server.
Chapter 3 Configuration 23

Printer

This profile allows you to con nect a printer to a serial port. Use this profile i f you intend to print using the lpd protocol on your UNIX system.
Note: Refer to your UNIX User Guide for tips on configuring the print spooler on
your UNIX system.

Terminal

This profile allows you to connect to a terminal to the serial port.
24 Chapter 3 Configuration
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