# Nullmodem

This adapter will enable you to use a normal serialcable as a nullmodem.

(to the Computer).
(to the Serialcable).

25 PIN D-SUB FEMALE to the Computer.
25 PIN D-SUB MALE to the Serialcable.

| Female | Male |
--- | --- | --- | ---
Shield Ground | 1 | 1 | Shield Ground
Transmit Data | 2 | 3 | Receive Data
Receive Data | 3 | 2 | Transmit Data
Request to Send | 4 | 5 | Clear to Send
Clear to Send | 5 | 4 | Request to Send
Data Set Ready | 6 | 20 | Data Terminal Ready
Data Terminal Ready | 20 | 6 | Data Set Ready
Ground | 7 | 7 | Ground

Contributor: Joakim Ögren

Source:
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Copyright © The Hardware Book Team 1996-2001.
May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2001-06-07