1. First Login
2. SIP Settings
3. Network Settings
4. Feature Settings
5. Fax Settings
6. Fax Machine

First Login

When first configuring your HandyTone, you must connect your computer to its LAN port and access its web interface at 192.168.2.1. If you'd like to open up the WAN port for administrative access, which is completely optional, go to the "Basic Settings" tab and change the following settings:

Disable Telnet: No
WAN Side Web/SSH Access: Yes
Reply to ICMP on WAN port: Yes

Next, update to the latest firmware for your HandyTone 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's website, and then click "Apply" once this has completed your device will reboot. You can then move on to the steps below.

1. First Login
2. SIP Registration
3. Network Settings
4. Feature Settings
5. Fax Settings
6. Fax Machine

SIP Registration

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

Primary SIP Server: sip.t38fax.com:5080 help
NAT Traversal: Keep-Alive
SIP User ID: SIP Username help
Authenticate Password: SIP Password (will be blanked out when saved) help

1. First Login
2. SIP Registration
3. Network Settings
4. Feature Settings
5. Fax Settings
6. Fax Machine

Network Settings

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 >= 5080.

Allow Incoming Packets from SIP Proxy Only: Yes

1. First Login
2. SIP Registration
3. Network Settings
4. Feature Settings
5. Fax Settings
6. Fax Machine

Feature Settings

Scroll down and configure the following options:

Disable-Call-Waiting: Yes
Disable-Call-Waiting-Caller-ID: Yes
Disable-Call-Waiting-Tone: Yes

1. First Login
2. SIP Registration
3. Network Settings
4. Feature Settings
5. Fax Settings
6. Fax Machine

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

1. First Login
2. SIP Registration
3. Network Settings
4. Feature Settings
5. Fax Settings
6. 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.