# Puck Mini Ports and Ethernet Pins

**URL:** <https://forum.botblox.org/t/puck-mini-ports-and-ethernet-pins/581>\
**Category:** BotBlox Hardware\
**Tags:** puck-mini\
**Created:** [June 8, 2026, 10:29pm UTC](https://forum.botblox.org/t/puck-mini-ports-and-ethernet-pins/581 "2026-06-08T22:29:00Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ElsieMichaelson](https://avatars.discourse-cdn.com/v4/letter/e/b5ac83/32.png) [@ElsieMichaelson](https://forum.botblox.org/u/ElsieMichaelson)\
**Post date:** [June 8, 2026, 10:29pm UTC](https://forum.botblox.org/t/puck-mini-ports-and-ethernet-pins/581/1 "2026-06-08T22:29:00Z")

</div>

_This topic was migrated from the BotBlox ticketing system after being summarized and anonymized._

### Question:

I’m using one of the ports of the Puck Mini with a 100BaseT ethernet device, using the pins from 20 to 23 (port 4, pairs C and D), while I have ports 1 and 2 connected to two Gigabit devices, which are working fine.

The device on port 4 is not communicating at all, do you know if the issue can be related to some settings of the switch?

The device on port 4 is on static IP (same subnetwork of the other two devices).

### Answer:

For 10/100BASE-T, you would need to use the A and B pairs of the ethernet pins. Pairs C and D are only used for 1000BASE-T.

(TS2603-0132)