MultiPort/LT User Reference
Page 19
Inside MultiPort/LT and Monitor Commands
Pin
Name
Direction
6
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 2-2.
Minidin-8 Pin Assignments - Modem Connection
When a channel is used for LocalTalk, the pin assignments shown in Table 2-3
apply.
Pin
Name
Direction
6/3
Transmit Data (TD) +/-
Out
5/8
Receive Data (RD) +/-
In
4
Signal Ground
-
Table 2-3.
Minidin-8 Pin Assignments - LocalTalk Connection
2.1.2.1. Modem Cable
The pinout for a hardware handshake modem cable is shown below. A
hardware handshake cable is needed if high speed (>9600) modems are
connected to the MultiPort/LT.
Minidin-8 Pin
DB-25 Pin
Function
Direction
5
3
Receive Data
In
3
2
Transmit Data
Out
4 & 8
7
Ground
-
2
5
Clear to Send
In
1
4 & 20
RTS & DTR
Out
7
8
CD (Not used)
In
Table 2-4.
Macintosh Hardware Handshake Modem Cable
