Two-Wire Modem (25-25)
This cable should be used for DTE
to DCE (for instance computer to modem) connections
without hardware handshaking.
(la
Computer).
(la
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 |
|
| System Ground |
7 |
7 |
|
|
|
|
|
| Jumper these: |
|
|
|
| Request to Send |
4 |
|
|
| Clear to Send |
5 |
|
|
|
|
|
|
| Data Set Ready |
6 |
|
|
| Carrier Detect |
8 |
|
|
| Data Terminal Ready |
20 |
|
|
|
|
|
|
| Request to Send |
|
4 |
|
| Clear to Send |
|
5 |
|
|
|
|
|
| Data Set Ready |
|
6 |
|
| Carrier Detect |
|
8 |
|
| Data Terminal Ready |
|
20 |
|
