The V.35 Interface
The V.35 interface
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| Pin # | Signal | Name | Direction | CCITT # |
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| A | PGND | Protective Ground | Common | 101 |
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| B | SGND | Signal Ground | Common | 102 |
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| C | RTS | Request to Send | Output | 105 |
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| D | CTS | Clear to Send | Input | 106 |
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| E | DSR | Data Set Ready | Input | 107 |
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| F | DCD | Data Carrier Detect | Input | 109 |
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| H | DTR | Data Terminal Ready | Output | 108 |
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| J | RI | Ring Indicator | Input | 125 |
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| L | TEST | Local Loopback Activation | Output | 141 |
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| N | RLB | Remote Loopback | Output | 140 |
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| P | TXD+ | Transmit Data | Output | 103A |
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| R | RXD+ | Receive Data | Input | 104A |
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| S | TXD- | Transmit Data | Output | 103B |
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| T | RXD- | Receive Data | Input | 104B |
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| U | CLK+ | Transmit Clock (DTE) | Output | 113A |
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| V | RCLK+ | Receive Clock (DCE) | Input | 115A |
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| W | CLK- | Transmit Clock (DTE) | Output | 113B |
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| X | RCLK- | Receive Clock (DCE) | Input | 115B |
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| Y | TCLK+ | Transmit Clock (DCE) | Input | 114A |
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| AA | TCLK- | Transmit Clock (DCE) | Input | 114B |
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| NN | TI | Test Indicator | Input | 142 |
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Selecting an Interface Cable | 104 |
