Grandstream: (HT802) ATA For Fax

Modified on Mon, 1 May, 2023 at 12:55 PM

SIP Registration

Select "FXS Port 1" from the primary menu, and and configure the following options for your SIP Registration:
  • Primary SIP Server: sip.ringoffice.com
  • NAT Traversal: Keep-Alive
  • SIP User ID: SIP Username ( Account id or DID account )
  • Authenticate Password: SIP Password  ( account password) (will be blanked out when saved)

Scroll down and configure the following options:
  • Register Expiration: 5
  • Local SIP Port: 5080 - If you have more than one device at a site, each device at a site should have a unique port, such as 5081, 5082, etc...



  • Allow Incoming Packets from SIP Proxy Only: Yes

Feature Settings

Scroll down and configure the following options:
  • Disable-Call-Waiting: Yes
  • Disable-Call-Waiting-Caller-ID: Yes
  • Disable-Call-Waiting-Tone: Yes

Fax Settings

Finally, configure the following T.38 specific options further down the screen:
  • Jitter Buffer Type: Fixed
  • Jitter Buffer Length: High
  • Disable Line Echo Canceller (LEC): Yes
  • Disable Network Echo Suppressor: Yes

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