Grandstream HT881 8-Port FXO Gateway
Grandstream HT881 8-Port FXO Gateway
The Grandstream HT881 is an FXO gateway for up to eight analog phone lines. It brings the copper lines from the phone company into your VoIP phone system, which is useful when you're moving in stages or keeping a few lines for a while.
One FXS port is there for an analog phone or fax machine, and it doubles as a lifeline: if the power goes out, Grandstream hard-relays that FXS port to an FXO line, so a phone on it still works over the copper line.
Quick guide to the two port types: an FXS port provides dial tone, so you plug in an analog phone, fax machine, door phone or overhead paging amplifier. An FXO port takes dial tone, so you plug in an analog phone line from the phone company. Our Crosstalk PBX appliances are pure VoIP with no analog ports, so an ATA or gateway is how you bring analog devices or phone lines onto the system.
Specifications
| Phone line ports (FXO) | 8x FXO (RJ11) |
|---|---|
| Phone ports (FXS) | 1x FXS (RJ11), with power-outage lifeline to an FXO line |
| Network | 2x 10/100/1000Mbps Ethernet, one with 802.3af PoE |
| SIP profiles | 3 |
| Fax | T.38 fax relay up to 14.4kbps, falls back to G.711 pass-through |
| Codecs | G.711, G.723.1, G.729, G.726-32, iLBC, Opus |
| Security | TLS and SRTP, AES-encrypted provisioning |
| Power | PoE (802.3af) or 12V/1A DC adapter (not included) |
| Dimensions | 190 x 100 x 28 mm |
| Weight | 0.46 kg |
| Operating temperature | 32-104°F (0-40°C) |
| Manufacturer part # | HT881 |
| UPC | 6947273704782 |
Good to know
- No power supply in the box. It runs on PoE (802.3af) from your switch, or a Grandstream 12V/1A adapter.
- Both network ports are Gigabit in bridge mode. In NAT router mode, Grandstream rates them up to 100Mbps.
- Fax over VoIP works best when your SIP provider supports T.38. Test your fax machine on the line before you rely on it.
- Only need four lines? The HT841 is the same gateway with four FXO ports.
What's in the box
- HT881 gateway
- Ethernet cable
- Quick installation guide
Frequently asked questions
How many phone lines can the HT881 connect?
Eight analog phone lines, on eight FXO ports. It also has one FXS port for an analog phone or fax machine.
Does the HT881 come with a power supply?
No. It runs on 802.3af PoE or a Grandstream 12V/1A adapter, sold separately.
Warranty and support
Grandstream products carry the manufacturer's warranty, and we handle the claim with the distributor for you. Questions before you buy? Email shop@crosstalksolutions.com or call 541-787-8870.