---
title: "ATA - Factory Reset 186/188"
slug: "ata-factory-reset-186-188"
tags: ["calltower", "public"]
updated: 2026-09-18T13:23:47Z
published: 2026-09-18T13:23:47Z
canonical: "learn.calltower.com/ata-factory-reset-186-188"
---

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

# ATA - Factory Reset 186/188

## Goal

The purpose of this article is to provide step by step instructions on how to factory reset a Cisco ATA 186 or Cisco ATA 188.

## Resolution/Steps

**MAKE SURE THAT ATA IS POWERED ON AND NOT PLUGGED INTO NETWORK**

**Step 1**

1. Using an analog phone with full keypad (Unhooked) plugged into the "Phone 1" port. Press the function button on the top of the ATA.
  1. "Phone 1" Port
    1. ![ATA Ports.PNG](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/ATA_Ports.PNG?sv=2026-02-06&spr=https&st=2026-11-05T01%3A28%3A12Z&se=2026-11-05T02%3A28%3A12Z&sr=c&sp=r&sig=UalnVdohL3wrz5Y7y879cr66%2B9zIXLqhi7WPdI9Risw%3D)
  2. Function button:
    1. ![ATA.PNG](https://cdn.us.document360.io/4662144b-ab1f-4796-8b7b-e9f9c609894f/Images/Documentation/ATA.PNG?sv=2026-02-06&spr=https&st=2026-11-05T01%3A28%3A12Z&se=2026-11-05T02%3A28%3A12Z&sr=c&sp=r&sig=UalnVdohL3wrz5Y7y879cr66%2B9zIXLqhi7WPdI9Risw%3D)
2. Enter the following: 322873738#*​
3. Enter * to save
4. Hang Up

## Common Issues/Related Articles

[Cisco - Hardware ATA 186 - Configure/Check the IP Address](/v1/docs/ata-186-configure-check-the-ip-address)

Analog Telephone Adapter (ATA) is a device that allows traditional telephones to connect to a digital phone service.

An Internet Protocol (IP) Address is a unique string of numbers separated by periods that identifies each computer using the Internet Protocol to communicate over a network.