---
title: "GPIO Schematic for the Hx1 and Hx2"
slug: "gpio-schematic-for-the-hx1-and-hx2"
updated: 2024-12-18T06:26:46Z
published: 2024-12-18T06:26:46Z
canonical: "docs.telosalliance.com/gpio-schematic-for-the-hx1-and-hx2"
---

> ## Documentation Index
> Fetch the complete documentation index at: https://docs.telosalliance.com/llms.txt
> Use this file to discover all available pages before exploring further.

# GPIO Schematic for the Hx1 and Hx2

## Scope

This document applies only to the Telos Hx1 (single line) and Hx2 (two-line) analog telephone hybrid.

## Description

The following image shows pinouts and wiring examples for the 9-pin D-style remote connector on the back of the unit.

![](https://cdn.document360.io/57e3cd80-d493-453c-9672-ad1b043dadc3/Images/Documentation/4028ebf0-b2e3-4006-bee7-0c8df2210989-image.png?sv=2026-02-06&spr=https&st=2026-11-12T13%3A03%3A18Z&se=2026-11-12T14%3A03%3A18Z&sr=c&sp=r&sig=LhkxmhGfL%2Bb9XI1vidmGS%2FKAPlRJmK13XiktCy%2FGfeA%3D)

## Let us know how we can help

If you have further questions on this topic or have ideas about improving this document, please [contact us](https://www.telosalliance.com/support-request).