Grandstream HT801Single-port analogue telephone adapter
Connects an existing analogue phone, fax machine, door entry panel or lift line to the Telexico cloud phone system.
- 1 FXS port
- T.38 fax relay
- 3-way conference
- TLS / SRTP secured
£35.99ex VAT
Grandstream HT801 at a glance.
Transcribed from the manufacturer’s datasheet. Ask us if a detail matters to your deployment and we will confirm it against the current hardware revision.
- Ports
- 1 × FXS (RJ11) for an analogue device; 1 × 10/100 Mbps Ethernet
- SIP accounts
- 1
- Fax
- T.38 Group 3 fax relay up to 14.4 kbps with automatic fallback to G.711 pass-through
- Codecs
- G.711 µ/a, G.722, G.723.1, G.729A/B, G.726-32, iLBC, Opus
- Telephony
- 3-way conference, caller ID (Bellcore, ETSI, BT, NTT, DTMF), pulse and DTMF dialling, 5 REN ring load, up to 1 km on 24 AWG
- Security
- SRTP, TLS, SIPS, HTTPS, SSH, AES-encrypted provisioning; secondary SIP server failover
- Power
- 5 V 1 A adapter
- Size
- 100 × 100 × 29.5 mm
The HT801, in plain English.
The HT801 is a one-port analogue telephone adapter: an analogue phone, fax machine, cordless DECT base, door entry panel or lift emergency line plugs into its FXS port and becomes an extension on the Telexico cloud phone system. With ISDN and analogue copper lines being withdrawn, it is how legacy devices survive the switch-off.
It supports T.38 fax relay with automatic fallback to G.711 pass-through, caller ID in the UK BT format, pulse and DTMF dialling and a 5 REN ring load, and it is secured with SRTP, TLS and encrypted provisioning with failover to a secondary SIP server.
Telexico provisions the HT801 remotely and supplies it configured for the device it will serve. Call for best price, and ask us first about lift lines and alarm panels, which have their own requirements.
Highlights
- Keeps a fax machine, PDQ terminal, lift line or door panel working after the ISDN and copper switch-off
- T.38 fax relay with G.711 fallback
- Secure, remotely provisioned and tiny
- The lowest-cost way to bring an analogue device onto the cloud
Best for
- Fax machines
- Door entry and gate panels
- Lift and emergency lines (subject to survey)
- Legacy analogue phones
Builds, bundles and what is in the box.
Prices exclude VAT. On a 12-month Telexico term the handsets are included; on rolling 30-day terms or an outright purchase the prices below apply. Volume pricing on 10+ handsets.
| Option | Telexico price | |
|---|---|---|
| HT801 | £35.99 ex VAT | Quote |
In the box
HT801 adapter, 5 V power adapter, network cable and quick installation guide.
On the Telexico cloud phone system
Every HT801 we supply registers to the Telexico cloud phone system: call recording included on every seat, the Telexico Mobile App and Telexico Web UC alongside the handset, one directory, one voicemail, one bill with your broadband. See the fully loaded seat →
Get the Grandstream HT801 on a Telexico system.
Send the desk count and we come back with the price for this model, the alternatives worth considering and the seat cost it sits on. No obligation, UK engineers, one supplier for phones and broadband.
- Prices on this page are ex VAT; volume pricing on 10+ handsets
- Handsets arrive provisioned for their extension, keys and groups
- On a 12-month Telexico term, handsets are included
- Existing Grandstream and Yealink phones can usually be re-provisioned free
Models often considered alongside the HT801.

GRP2602
Essential 2-line IP phone
£51.59ex VAT

DP722 + DP752
DECT cordless phone system
From£122.40ex VAT
GUV3050
HD Bluetooth headset with USB dongle
£59.99ex VAT
Grandstream HT801: your questions.
Will my fax machine work on the HT801?
In most cases, yes. The HT801 supports T.38 fax relay with automatic fallback to G.711 pass-through. We test each fax line after installation.
Can I connect a lift line or alarm dialler?
Often, but lift lines and alarm panels have specific requirements, including battery back-up, and some need a dedicated solution. We survey them before quoting.
How many devices does one HT801 support?
One analogue device per HT801. For two devices, we supply two adapters or a multi-port unit.