Grandstream HandyTone 286

Grandstream_handytone HT-286 sip gateways 600x600.jpg

Lines/SIP Accounts

  • 1 lines/1 SIP account

Protocol Support

  • SIP 2.0 (RFC 3261)
  • HTTP
  • ICMP
  • DNS
  • DHCP
  • NTP
  • TFTP
  • PPPoE protocols

Feature Keys

  • 1 button

LAN Interface

  • RJ-45 10 Mbps

Device Management

  • Web interface or via secure (AES encrypted) central configuration file for mass deployment
  • Support device configuration via built-in IVR, Web browser or central
  • configuration file through TFTP or HTTP
  • Support Layer 2 (802.1Q, VLAN, 802.1p) and Layer 3 QoS (ToS, DiffServ,MPLS)
  • Auto/manual provisioning system
  • NAT-friendly remote software upgrade (via TFTP/HTTP) for deployed devices
  • including behind firewall/NAT
  • Syslog support (on Rev 2.0)

DHCP Server/Client

  • Yes, Client

Audio Features

  • Advanced Digital Signal Processing (DSP)
  • Dynamic negotiation of codec and voice payload length
  • Support for G.723,1 (5.3K/6.3K), G.729A, G.711 μ/A, G.726, and iLBC codecs
  • In-band and out-of-band DTMF (in audio, RFC2833, SIP INFO)
  • Silence Suppression, VAD (voice activity detection), CNG (comfort noise generation) ANG (automatic gain control), Line Echo Cancellation( G.168)
  • Adaptive jitter buffer control
  • Packet delay & loss concealment
  • Support volume amplification
  • Support configurable Call Progress Tones

Call Handling Features

  • Caller ID display or block
  • Call waiting caller ID
  • Call waiting/Flash, Call
  • transfer
  • hold
  • forward
  • mute
  • 3-way conferencing(on Rev 2.0)

Network and Provisioning

  • Manual or dynamic host configuration protocol (DHCP) network setup; RTP and NAT support traversal via STUN

Fax over IP

  • T.38 compliant Group 3 Fax Relay up to 14.4kpbs and auto-switch to G.711 for
  • Fax Pass-through (pending)
  • Fax Datapump V.17, V.19, V.27ter, V.29 for T.38
  • fax relay


  • DIGEST authentication and encryption using MD5 and MD5-sess

LAN Interface

  • 1 x RJ45 10 Mbps

FXS phone port

  • 1 x FXS



  • 1


  • Green and red / solid state & blinking state

Universal Switching Power Adapter

  • Input: 100-240VAC 50-60 Hz
  • Output: +5VDC, 1200mA
  • UL certified


  • 65mm (W) x 93mm (D) x 27mm (H)


  • 0.57 lbs (0.26kg)


  • 32 - 104oF / 0 - 40oC


  • 10% - 90% (non-condensing)


  • FCC/CE/C-Tick

Ships With:

  • HT–286 Main Case
  • Universal Power Adaptor
  • Ethernet Cable


  • 1 Mb Flash
  • 256 Kb SRAM
  • a TI TMS320VC5402 100 MHz DSP
  • an RTL8019AS ISA 10 Mbit Ethernet controller
  • a phone interface
  • and some glue around that

These are quite cheap components (the most expensive part is the $6 DSP).

They work great though. Very easy to configure, excellent audio, great selection of codecs.

It has a handy lighted button, which doubles as a status/MWI and accesses a built-in IVR menu when pressed. Pressing the button twice puts the unit in "IP dial" mode.

Where to Buy

See Also

Go back to Analog Telephone Adapters

Created by:, Last modification: Wed 30 of Jul, 2014 (16:23 UTC) by voxsys
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