Analogue adapter (ATA)
Keep an existing analogue phone by registering a Grandstream HT801 or HT802 adapter as a desk handset or on a desk phone line.
An analogue telephone adapter (ATA) puts an ordinary corded or cordless analogue phone onto the line — plug the phone into the adapter, the adapter into your network. You need the phone's SIP credentials: for a desk handset — a person's or a shared one like the reception phone — click Show setup link on its row in Settings → Phone → Voice & calling → Calling devices; for a desk phone line, on the number's card in Settings → Call routing. See Desk phones for the difference.
Connect the adapter's network port to your router and plug the analogue phone into the Phone 1 port. Power it on.
On the analogue phone, dial *** then 02 — the adapter reads out its
IP address.
In a browser on the same network, open http://<adapter-ip> and sign in
(factory password admin — change it while you're there).
On the FXS PORT1 tab, fill in:
- Account Active: Yes
- Primary SIP Server: the server shown under Show setup link —
sip.telnyx.eufor a UK practice,sip.telnyx.comfor a US one - SIP User ID and Authenticate ID: the line's username
- Authenticate Password: the line's password
- SIP Transport: TLS (port
5061) - Register Expiration:
3minutes
Set the vocoder order, SRTP, the keep-alive and DTMF to the values in the settings every phone needs.
Click Apply, then Reboot. The Status tab shows FXS Port 1 as Registered, and the phone gets a dial tone.
Call the number from a mobile — the analogue phone rings. If the line is two-way, dial out to confirm outbound.
Analogue phones plugged into an ATA stop working during a power cut, unlike an old exchange line. If the practice relies on this phone for emergencies, keep it on a UPS or keep a charged mobile as the fallback.
Grandstream's HT8xx manuals live at grandstream.com/support.