Grandstream HT502

Grandstream’s HT series of Analog Telephone Adapters (ATAs) offer a ton of features at an affordable price point. They are trusted and deployed by some of the world's largest service providers. The HT502 is a dual-port FXS, with 10/100 Mbps ethernet and no router. It supports 2 SIP accounts.

  1. Firmware
  2. SIP Registration
  3. Additional Settings
  4. Fax Settings
  5. Fax Machine


Firmware

Update to the latest firmware for your HT502 before connecting to our service. You can download the current production release from the link above. Once downloaded, you'll navigate to "Advanced Settings" and click the "Upload from Local Directory" button. Select the file you downloaded from Grandstream' website, and then click "Apply" once this has completed your device will reboot. You can then move on to the steps below.




  1. Firmware
  2. SIP Registration
  3. Additional Settings
  4. Fax Settings
  5. Fax Machine


SIP Registration

Select "FXS Port 1" from the primary menu, and and configure the following options for your SIP Registration:


Primary SIP Server: sip.t38fax.com:5080 help
Outbound Proxy: sip.t38fax.com:5080 help
NAT Traversal: Keep-Alive
SIP User ID: SIP Username help
Authenticate Password: SIP Password help
Local SIP Port: 5080 ( Not pictured below )




  1. Firmware
  2. SIP Registration
  3. Additional Settings
  4. Fax Settings
  5. Fax Machine


Additional Settings

Scroll down and configure the following options:


Disable-Call-Waiting: Yes
Disable-Call-Waiting-Caller-ID: Yes
Disable-Call-Waiting-Tone: Yes
Allow Incoming Packets from SIP Proxy Only: Yes




  1. Firmware
  2. SIP Registration
  3. Additional Settings
  4. Fax Settings
  5. Fax Machine


Fax Settings

Finally, configure the following T.38 specific options further down the screen:


Fax Mode: T.38
Fax Tone Detection Mode: Callee (Added as of version 1.0.8.2)




  1. Firmware
  2. SIP Registration
  3. Additional Settings
  4. Fax Settings
  5. Fax Machine


Fax Machine

Finally, configure your fax machine to work properly with your Power-T.38 SIP Trunk. Review our Recommended Fax Machine Settings for details.



Why 5080? Learn More

Enter your SIP Username here. (This should be a DID assigned to your account that is available for registration. IE: 18043027000)
Still Confused? Learn More!

Enter the SIP Password for the SIP Username you entered above.
Still Confused? Learn More!