Grandstream HT488 - Installation Instructions

Connect the PSTN

Use these instructions in conjunction with the HT488 Installation Diagram and User Manual

Identify the Phone Handset (PHONE), ADSL Filter (FILTER), ADSL Modem (MODEM) and Computer (PC)

Connect the PSTN (filtered phone line)

DO NOT plug in the HT488 power pack until asked to do so.

Remove the PHONE cord plug from the socket in the FILTER (most likely labelled as phone or handset)

Now plug this connector into the HT488 socket marked PHONE

Take the supplied PHONE cord and plug one end into the LINE socket on the HT488

Plug the other end back into the socket that you previously had the PHONE plugged into

The HT488 is now effectively inserted in series with the previous PHONE cord

Test that Your Phone Still Works Like It Did Before

Pickup the handset

You should hear the standard "telco" (phone company) dialtone

Make a test call to a local number or your voicemail if necessary

Connect the Ethernet Cable to Your Router

Plug on end of the new ethernet cable onto the WAN socket on your HT488 and the other end into a spare LAN port on your router.

(Tech Tip: Your router MUST be configured for Dynamic DHCP - normal)

OPTION: NO Router - Connecting Directly to a MODEM

NOTE: Even though this connection mode works in most cases, this style of setup is not supported by SmartFone as there are too many modem variables encountered.

Remove the ethernet (network) cable from the MODEM (leave the other end plugged into your compter) and plug it into the LAN socket of the HT488

Take the supplied ethernet (network) cable (looks like the one plugged into your compter) and plug one end into the WAN socket on the HT488

Connect the other end of this ethernet cable and plug it into the socket in the modem that you previously removed the cable from (the one that previously went to the computer)

The HT488 is now effectively inserted in series with the previous ethernet cable.

Apply the Power

Plug the power pack (plugpack) into a power point.

Insert the free plug end into the HT488 socket marked DC 5V

Turn on the power at the power point

Power Up Sequence

If the HT488 ATA is operating correctly it will follow a 30 sec initialization sequence (approx).

The button light on the top of the box will fast flash red for about 10 seconds, then go out.

You will hear a relay click inside the box, then the red button light on the top of the box will flash up to 10 times then extinguish.

Wait another 10 seconds then if all goes well then you can start making calls.

How to Make Calls Using Your Net2MAX-1CC Account

Full User Instructions

Detailed Calling Options

Internet Number (all plans)
Access Numbers (all plans)
Local Number (SOHO or higher plans)

Help & Troubleshooting

Troubleshooting Tips
Setup Instructions
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