ATA Setup: Grandstream HT801 to Hosted 3CX

This method is no longer working with the newer 3CX systems (V18+), an SBC is required for faxing to work properly

In this guide we will show you how to connect your Grandstream ATA to a cloud/hosted instance of 3CX. This method will use G.711 as your faxing method which is supported on Voxtelesys SIP.

• Note: for fax machines over SIP it is recommended to lower the BAUD rate on the fax machine. Try BAUD rate at 9600 bps or even lower at 7200 bps.

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1. Log in to ATA Device

• If you do not know the IP address of the ATA, you can plug in an analog phone and dial ***02 and it will play back the IP address.

2. Select FXS Port

3. Fill in Data

Primary SIP Server: Your 3CX Static IP

• Must be a static IP address.

SIP User ID: 3CX Extension number

Authentication ID: 3CX ID

Authentication Password: 3CX Password

• 3CX ID and Password can be found under the extension > Phone Provisioning

Enter in Grandstream ATA/GUI:

4. Fill in Data (continued)

Codecs:

Enable Feature Settings:

Fax Modes:

5. "Apply" settings on Grandstream ATA

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For more ATA Guides, click here!

For Voxtelesys Portal Guides, click here!