Reference and Sources: 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 - | Arrows indicate signal direction: --> indicates DTE to DCE, and <-- indicates DCE to DTE. 1 Any pin not referenced is not connected.
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