From VoIP.ms Wiki

📖 VoIP.ms Grandstream HT802 V2 Setup Guide

Contents 1 Overview 2 Requirements 3 Logging into the Web Interface 4 General Settings (FXS PORT1) 5 SIP Settings Tab 6 Codec Settings Tab 7 Advanced Settings 8 Faxing 9 Testing

Overview

This guide walks you through configuring a Grandstream HT802 V2 with VoIP.ms. It supports: - Voice service - Fax (T.38 or G.711 pass-through)

Requirements

• Grandstream HT802 V2
• Latest firmware installed (Grandstream site) (We you use firmware version 1.0.5.7 or later.)
• VoIP.ms account with a configured DID and a sub-account
• Internet access via Ethernet
• Phone or fax device connected to FXS Port 1

Logging into the Web Interface

Connect the HT802 to your network and power it on.

• Pick up the connected phone, dial:
• ***02 (Star Star Star 0 2)

The ATA will read its IP address. Open a browser and go to that IP (e.g., http://192.168.1.50).

Login

• Username: admin
• Password: found on device label (or as set by you)

General Settings (FXS PORT1)

• Account Active: ✅ Checked
• Primary SIP Server: popserver.voip.ms (or your nearest VoIP.ms POP)
• Failover SIP Server _Optional: backup POP_ from a different POP location.
• Prefer Primary SIP Server Yes
• SIP User ID Your VoIP.ms sub-account username
• SIP Authenticate ID Same as SIP User ID
• SIP Authentication Password Your sub-account password
• NAT Traversal Keep-Alive (recommended)

Click Save and Apply.

SIP Settings Tab

• Register Expiration: 120 seconds
• Enable SIP OPTIONS Keep Alive: Yes
• Local SIP Port: 5060 (change if multiple ATAs)

Disable extra headers:

• Privacy Header → No
• P-Preferred-Identity Header → No
• P-Access-Network-Info → No
• P-Emergency-Info → No

Codec Settings Tab

Preferred Vocoder (in all sessions): G722, (G.711 μ-law) then set G711 for the rest.

Advanced Settings

Check SIP User ID for Incoming INVITE: Enabled

Allow incoming SIP messages from SIP proxy only: Enabled

Faxing

Ensure options like Enable‑Call‑Waiting, Caller‑ID, and Tone are unchecked — avoiding disruptions during fax sessions.

Security Settings: Enable Allow incoming packets from SIP proxy only to restrict access to VoIP.ms servers.

Under Call Settings

Disable Local Call Features: Yes

• Enable-Call-Waiting: uncheck
• Enable-Call-Waiting-Caller-ID: uncheck
• Enable-Call-Waiting-Tone: uncheck

Under Call Features Settings:

• Set Enable Local Call Features No to prevent unintended feature code usage via the fax machine.

Under Codec Settings:

• Fax Mode: T.38 (if you are using it for faxing with a VoIP.ms FAX POP server)
• T.38 Max Bit Rate: 14400 bps
• Jitter Buffer: Fixed, High

Under Analog Signal Line Configuration

• Enable Line Echo Canceller (LEC) → Check

Testing

Reboot the ATA after applying settings.

Check Status tab → Registration should be Yes.

Dial: 4443 for a Voice Echo Test.