A Grandstream HT8xx analog telephone adapter (ATA) connects analog devices, such as a fax machine or an analog handset, to your VOXO phone service. The adapter sits between your network and the analog device and registers to VOXO as a phone line.
Which model do I have
The HT8xx family differs by how many analog (FXS) ports each model has. Each port maps to one analog device.
| Model | Analog ports |
|---|
| HT801 | 1 — for a single fax machine or analog phone |
| HT812 | 2 |
| HT814 | 4 |
| HT818 | 8 — for larger deployments |
Some sites use one HT801 per fax machine so a single adapter failure only affects one machine.
Connect the adapter
Connect the network
Plug an Ethernet cable from your network into the ATA’s network port.
Connect the analog device
Plug your fax machine or analog phone into one of the phone (FXS) ports.
Connect power
Connect power. The adapter pulls its configuration from VOXO automatically once it is online.
If the adapter does not come online
An ATA that never registers is almost always a network problem rather than a faulty unit. Before assuming the hardware is bad:
Test the port with a laptop
Plug a laptop into the same Ethernet port. If the laptop cannot get online, the port is the problem.
Try a different port
Move the cable to a different switch or router port.
Try a new cable
Swap in a known-good Ethernet cable.
Check the link light
Confirm the link light on the ATA illuminates.
