Flow Control Requirements; For Macintosh Computers - 3Com 56K Command Reference Manual

Flow Control If your computer and software support Clear to Send and you wish to use
Requirements Transmit Data hardware flow control (&H1), Pin 5 (DB-25) or Pin 8 (DB-9)
is required.
If your computer and software support Request to Send and you wish to
use Received Data hardware flow control (&R2), Pin 4 (DB-25) or Pin 7
(DB-9) is required.
For Macintosh If you're connecting your modem to a Macintosh computer, we strongly
Computers recommend that you purchase a hardware handshaking cable to get the
most reliable performance.
Mac Pin
1
2
3
4
4, 8
5
Mac Pin Description
Output Handshake
Input Handshake
Transmit Data -
Ground
Ground to Received
Data
Received Data -
Technical Specifications
Modem Pin Modem Pin Description
4, 20 Request-to-Send and Data
Terminal Ready
5 Clear-to-Send
2 Transmit Data
7 Ground
3 Received Data
E-5