How do I check connections and lights for my HT814/818v2 telephone adapter?

Updated 26 September 2025 16:32

The Grandstream HT814v2 or HT818 ATAv2 (analog telephone adapter) connects to your fibre modem so you can add more phone lines. This is normally installed by a technician, but if you’re having technical issues you can follow the steps below to check the connections and lights on the unit.

Checking connections

An Ethernet cable should be connected from the NET1 (right) port on the ATA to the 1G LAN port on the fibre modem.
Use the 10G LAN port on the modem to connect a router or a device that requires an Ethernet connection.
If you’ll be using 3 or more phone lines, you can connect them to the ports on the ATA (4 or 8, depending on the model). If you’re using fewer than 3, connect them directly to the modem. You should not have phone lines connected to both the ATA and the modem.

Checking lights

Power	The power LED will flash while booting up and then turn solid.
NET1	The NET1 LED will be lit when connected to the Cogeco network.
NET2	The NET2 LED will be lit when connected to another ATA (if applicable).
Phone (4-8 LEDs, 1 for each phone jack)	LED Off - line unregistered LED On (solid blue) - line registered and available Fast blinking - Off the hook or busy Slow blinking - New voicemail message