X.21 DTE Cable Pinout (DB-60 to DB-15)
| 60 Pin1 | Signal | Description | Direction | 15 Pin | Signal |
|---|---|---|---|---|---|
| J1-48 J1-47 |
GND MODE_2 |
Shorting group | - | - | - |
| J1-51 J1-52 |
GND MODE_DCE |
Shorting group | - | - | - |
| J1-46 | Shield_GND | Single | - | J2-1 | Shield GND |
| J1-11 J1-12 |
TxD/RxD+ TxD/RxD- |
Twisted pair no. 3 | → → |
J2-2 J2-9 |
Transmit+ Transmit- |
| J1-9 J1-10 |
RTS/CTS+ RTS/CTS- |
Twisted pair no. 2 | → → |
J2-3 J2-10 |
Control+ Control- |
| J1-28 J1-27 |
RxD/TxD+ RxD/TxD- |
Twisted pair no. 6 | ← ← |
J2-4 J2-11 |
Receive+ Receive- |
| J1-1 J1-2 |
CTS/RTS+ CTS/RTS- |
Twisted pair no. 1 | ← ← |
J2-5 J2-12 |
Indication+ Indication- |
| J1-26 J1-25 |
RxC/TxCE+ RxC/TxCE- |
Twisted pair no. 5 | ← ← |
J2-6 J2-13 |
Timing+ Timing- |
| J1-15 Shield |
Control_GND - |
Twisted pair no. 4 | - - |
J2-8 Shield |
Control GND - |
Notes
- Arrows indicate signal direction: → indicates DTE to DCE, and ← indicates DCE to DTE.
- (1) Any pin not referenced is not connected.