Grandstream HT704 Setup Guide

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This forum is for those users who have already purchased a configuration file with the SIP settings needed to configure any SIP compatible device.

1. Please use this forum only as a means to share your configuration advice and guides for ATA devices and SIP clients that you are using with our service.
2. For any questions relating to device configuration, please use the other forum sections or post your question directly in the device topic that your question is meant for.
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Grandstream HT704 Setup Guide

Post by Jake »

Credits to Val, thank you for your help.

The attached PDF will help you set up your Grandstream HT704 device from scratch. It is a known working configuration so if you are having troubles with your Grandstream HT704 reset back to defaults and follow this guide.

Edit by LiptonBrisk: Set “SIP Registration Failure Retry Wait Time” to 120 seconds.

Enabling "Allow Incoming SIP Messages from SIP Proxy Only" is a good idea for preventing SIP scanners/hackers. However, you may want to change that setting to "No" because FPL to FPL and Fongo to FPL calls may not work with that setting enabled, depending on the server being used and how switches FPL uses are configured. Fongo Home Phone has this setting disabled.

Do what Mango wrote below.
Grandstream HT704 ATA Config FreePhoneLine.pdf
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Tried and True
Posts: 411
Joined: 08/14/2014
SIP Device Name: OBi110
Firmware Version: 1.3.0 (Build: 2824)
ISP Name: Telus
Computer OS: Windows 7
Router: Toastman Tomato

Re: Grandstream HT704 Setup Guide

Post by Mango »

To prevent one-way or no audio with the new FPL switches, the firmware of your device may need to be updated. You should be using at least You may download the latest version from

Once the new firmware is installed, set SIP REGISTER Contact Header Uses to WAN address.
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