> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# RJ-12 or RJ-11 Telephone Round Panel Mount Extension Cable

**Type:** Product page · **SKU:** ADA5844 · **Brand:** [Adafruit](https://core-electronics.com.au/brands/adafruit-australia)
**Page:** https://core-electronics.com.au/rj-12-or-rj-11-telephone-round-panel-mount-extension-cable.html ([markdown](https://core-electronics.com.au/rj-12-or-rj-11-telephone-round-panel-mount-extension-cable.html.md))

If you need to add a panel-mount connection for telephone-interfacing projects, but don't have the time or ability to cut a custom oval or square...

## Pricing

- **Price:** $13.65 (inc GST) — $12.41 AUD, exc GST
- **Quantity discounts:** 10+ $12.04 (exc GST) · 50+ $11.79 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Aug 20 and Aug 24.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=ADA5844:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
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- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

If you need to add a panel-mount connection for telephone-interfacing projects, but don't have the time or ability to cut a custom oval or square hole, this **RJ-12 or RJ-11 Telephone Round Panel Mount Extension Cable** is the easiest and fastest way to panel-ify your existing phone kit. It's about 30mm in diameter, so you can drill a hole in your wood, plastic or metal with a common hole-saw or bit, no special shapes or filing required. Un-screw the plastic nut, insert the plug and re-attach. Ta-da: Now you have an RJ-12 jack with an RJ-12 plug. The plug has the exact same wire order as the jack so its a full pass-through connection.

**Note that RJ-11 and RJ-12 use the same connector! The difference is RJ-11 has only 4 wires inserted, RJ-12 has all 6. So you can use this adapter for either.** Note this is *not* compatible with RJ-45 Ethernet Jacks or plugs, those are bigger and have more contacts.

It's designed to easily attach to a panel up to 16mm thick (or 0.625"), or as thin as a few mm. Perfect for adding an Ethernet port to your project enclosure! Adafruit like this adapter in particular for its solid body and 'forgiving' plastic lip that hides the drill hole.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/A/D/ADA5844-1.jpg)