![image2018-11-14_14-24-7-version-1-modificationdate-1704381653957-api-v2.png](https://docscontent.nvidia.com/dims4/default/3ea1e26/2147483647/strip/true/crop/239x317+0+0/resize/239x317!/quality/90/?url=https%3A%2F%2Fk3-prod-nvidia-docs.s3.us-west-2.amazonaws.com%2Fbrightspot%2Fconfluence%2F0000018c-e393-da68-ab9f-f3ffdd430000%2Fimages%2Fdownload%2Fattachments%2F2477579267%2Fimage2018-11-14_14-24-7-version-1-modificationdate-1704381653957-api-v2.png)
QSFP Pin Description
Connector Pin Number | Pin Name | Signal Description |
1 | GND | Ground |
2 | Tx2n | Transmitter Inverted Data Input |
3 | Tx2p | Transmitter Non-Inverted Data Input |
4 | GND | Ground |
5 | Tx4n | Transmitter Inverted Data Input |
6 | Tx4p | Transmitter Non-Inverted Data Input |
7 | GND | Ground |
8 | Mod-SelL | Module Select |
9 | ResetL | Module Reset |
10 | Vcc Rx | +3.3 V Power supply receiver |
11 | SCL | 2-wire serial interface clock |
12 | SDA | 2-wire serial interface data |
13 | GND | Ground |
14 | Rx3p | Receiver Non-Inverted Data Output |
15 | Rx3n | Receiver Inverted Data Output |
16 | GND | Ground |
17 | Rx1p | Receiver Non-Inverted Data Output |
18 | Rx1n | Receiver Inverted Data Output |
19 | GND | Ground |
20 | GND | Ground |
21 | Rx2n | Receiver Inverted Data Output 3 |
22 | Rx2p | Receiver Non-Inverted Data Output 3 |
23 | GND | Ground |
24 | Rx4n | Receiver Inverted Data Output 3 |
25 | Rx4p | Receiver Non-Inverted Data Output 3 |
26 | GND | Ground |
27 | ModPrsL | Module Present |
28 | IntL | Interrupt |
29 | Vcc Tx | +3.3 V Power supply transmitter |
30 | Vcc 1 | +3.3 V Power Supply |
31 | LPMode | Low Power Mode |
32 | GND | Ground |
33 | Tx3p | Transmitter Non-Inverted Data Input |
34 | Tx3n | Transmitter Inverted Data Input |
35 | GND | Ground |
36 | Tx1p | Transmitter Non-Inverted Data Input |
37 | Tx1n | Transmitter Inverted Data Input |
38 | GND | Ground |
QSFP Connector Male and Female Views
![image2018-11-22_11-37-19-version-1-modificationdate-1704381653260-api-v2.png](https://docscontent.nvidia.com/dims4/default/923eb56/2147483647/strip/true/crop/361x311+0+0/resize/361x311!/quality/90/?url=https%3A%2F%2Fk3-prod-nvidia-docs.s3.us-west-2.amazonaws.com%2Fbrightspot%2Fconfluence%2F0000018c-e393-da68-ab9f-f3ffdd430000%2Fimages%2Fdownload%2Fattachments%2F2477579267%2Fimage2018-11-22_11-37-19-version-1-modificationdate-1704381653260-api-v2.png)
In order to connect a host PC to the Console RJ45 port of the system, a RS232 harness cable (DB9 to RJ45) is supplied.
RJ45 to DB9 Harness Pinout
![image2018-11-14_14-44-47-version-1-modificationdate-1704381653670-api-v2.png](https://docscontent.nvidia.com/dims4/default/19bcc77/2147483647/strip/true/crop/785x392+0+0/resize/785x392!/quality/90/?url=https%3A%2F%2Fk3-prod-nvidia-docs.s3.us-west-2.amazonaws.com%2Fbrightspot%2Fconfluence%2F0000018c-e393-da68-ab9f-f3ffdd430000%2Fimages%2Fdownload%2Fattachments%2F2477579267%2Fimage2018-11-14_14-44-47-version-1-modificationdate-1704381653670-api-v2.png)
RJ-45 Console and I²C interfaces are integrated in the same connector. Due to that, connecting any cable other than the Mellanox supplied console cable may cause an I²C hang.
Using uncertified cables may damage the I²C interface. Refer to the Replacement Parts Ordering Numbers appendix for harness details.