Installing the ARN

Connecting a Console Modem

A modem provides a system administrator with remote access to the ARN. It is a good idea to connect a modem in case the ARN experiences system problems.

Note: To use the Netboot, Directed Netboot, or Local Boot software configuration options, you must connect a console the first time you power up the ARN. Refer to Chapter 2, “Starting the ARN” for details.

To use a modem connection for a management console, you can connect an external modem to the modem interface or you can connect a telephone line directly to an optional V.34 Console Modem adapter module. Both ports are on the ARN back panel.

Table 1-4 provides the default settings for both types of back-panel modem interfaces.

Table 1-4.

Console Modem Defaults

 

 

Modem Signal/Parameter

Default Value

 

 

Clear To Send (CTS)

On

 

 

Data Terminal Ready (DTR)

Set to answer all incoming calls.

 

 

Data Carrier Detect (DCD) or

On while carrier is present (the ARN uses DCD to

Received Line Signal Detection

detect modem connect and disconnect).

(RLSD)

 

 

 

 

Data Set Ready (DSR)

On

 

 

Ready to Send (RTS)

Ignored

 

 

Synchronous/Asynchronous Mode

Asynchronous

 

 

 

AutoAnswer

 

Answer on 2 rings with DTR active.

 

 

Local Character Echo

Off

 

 

Supervisory Functions

Off

 

 

 

Baud Rate

 

9600

 

 

 

Data Bits

 

8

 

 

 

Stop Bits

 

1

 

 

 

Parity

 

None

 

 

 

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Nortel Networks Passport ARN Routers manual Connecting a Console Modem, Console Modem Defaults