# Modem (25-25) Cable

This cable should be used for DTE to DCE (for instance computer to modem) connections with hardware handshaking.

(To Computer).
(To Modem).

25 PIN D-SUB FEMALE to the Computer
25 PIN D-SUB MALE to the Modem

| Female | Male | Dir
--- | --- | --- | ---
Shield Ground | 1 | 1 |
Transmit Data | 2 | 2 |
Receive Data | 3 | 3 |
Request to Send | 4 | 4 |
Clear to Send | 5 | 5 |
Data Set Ready | 6 | 6 |
System Ground | 7 | 7 |
Carrier Detect | 8 | 8 |
Data Terminal Ready | 20 | 20 |
Ring Indicator | 22 | 22 |