Product Overview :

VAYU 2W/4W is a G.SHDSL.bis modem which extends distances of fast Ethernet service with variable data rate from 256Kbps to 30 Mbps using TC-PAM (Trellis Code –Pulse Amplitude Modulation) technology.

G.SHDSL.bis technology extends transmissions farther than any other DSL technology, opening the door for service providers to deliver low cost and broadband access to a wider subscriber base. They are cost-effectively to extend Ethernet distance up to several kilometers via one or two pairs of twisted copper cables, which is widely and commonly used in subscriber local loops. The modem employs TC-PAM128 compliant G.SHDSL.bis technology and EFM bonding to provide maximum 30Mbps symmetrical data over 2-pairs of twisted copper lines.

Features :

  • Provides 10/100 Mbps data connectivity on 1-pair / 2-pair unconditioned twisted copper pairs.
  • Operates at multiple data rates from 256 Kbps to 15040 Kbps on one-pair cable and 512Kbps to 30080 Kbps on two-pair cable.
  • TC-PAM64 (11.4 Mbps/pair) : supports 4 wires up to 22.8 Mbps
  • TC-PAM128 (15 Mbps/pair) : supports 4 wires up to 30 Mbps
  • Supports EFM bonding
  • LED indicators for alarms

Technical Specifications

SHDSL Line Interface Specifications

  • Line type : 2 or 4 Wire (twisted pair operation) Configurable
  • Line Code : TCPAM as per the ITU-T G991.2
  • Line Impedance : 135 Ohms
  • Connector : RJ45
  • Transmit Signal Power up to : 16.8dBm
  • Line protection : As per ITU-T K20 and K21
  • Specification : ANSI T1.601
  • Distance : Supports Various Rate-Range Configurations

Ethernet Interface Specifications

  • No. of Ethernet ports : (1/4 Port), RJ45 connectors for UTP cables
  • Interface Compliance : IEEE 802.3 Compliant
  • Bridging Protocol Supported Ethernet Over First Mile EFM Protocol
  • 10Base-T and 100Base-TX support

System Specifications

  • line speed on one pair cable is N x 64Kbps (where N= 4 to 235)
  • line speed on two pair cable is N x 128Kbps (where N= 4 to 235)

Front Panel Indications

  • Interface status and system status

Power Supply

  • Operating Voltage 230VAC 50/60 Hz Operation and 48V DC
  • Single Power Supply Supports both the AC and DC voltages


  • Operating Temperature : 0 ~ 55°C
  • Humidity : 5% ~90% non-condensing
  • Storage Temperature : -40 ~ 70°C