MultiPort/LT User Reference
Page 18
Chapter 2
2.1.
MultiPort/LT Operation
When first powered on, the MultiPort/LT executes an Eprom resident program
called the "monitor". The main function of the monitor in normal operation is
to load the MultiPort/LT software called "LT_Code" from Flash Eprom (or a
network host if the Flash copy is corrupted), and then to transfer control of the
MultiPort/LT operation to the gateway code. Once the MultiPort/LT's
gateway code is running, the MultiPort/LT can operate as an ARA server,
AppleTalk Router and IP and DECnet Gateway.
2.1.1
Console Port
The console port min-din 8 connector is located on the rear panel of the case,
and is used for direct terminal connection. The pinout is shown below:
Pin
Name
Direction
6/3
Transmit Data (TD) +/-
Out
5/8
Receive Data (RD) +/-
In
4
Request to Send (RTS)
Out
2
Clear to Send (CTS)
In
4
Signal Ground
-
7
Data Carrier Detect (DCD)
In
1
Data Terminal Ready (DTR)
Out
Table 2-1.
Console Port Pin Assignments
2.1.1.1. Port Requirements
For successful communication, the following configuration is required:
❏
The MultiPort/LT detects when a terminal is connected by monitoring
the level of the receive data signal.
2.1.2
Minidin-8 Connectors
The Minidin-8 connectors on the MultiPort/LT may be used for either LocalTalk
or modem connections.
When a modem is connected, the pinout is as shown in Table 2-2.