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HLI-2W2 (Last Time Buy)

The HelixNet HLI-2W2 is a dual 2-wire partyline interface module for the HMS-4X main station. The HelixNet IP networking guide provides specifications, best practices and guidance for the integration of HelixNet into an existing or new IP network.



  • 2-wire interface for HMS-4X(2)
  • Auto nulling
  • Level and VOX control
  • Clear-Com / RTS-TW Compatible
  • Call and RMK signaling

The HelixNet System 

  • Wired Partyline - Networked
  • Flexible cabling
  • Up to 24 Channels – Licensed
  • Program Audio user lever control

Effortless Management

  • Fast front panel control and configuration
  • Easy to use CCM browser configuration
  • Plug-and-go with auto discovery
  • Central upgrades from main station

Item Code




2-wire Partyline: (2) 3-pin XLR-F


Compatibility: Clear-Com, RTS-TW configurable with Call and Remote Mic Kill

Termination: External system

Nulling: R-L-C hybrid; user initiated Auto-Calibration with Echo Cancellation

Power: 25mA from external system

Voltage: 20-30V DC (max)

Maximum Level Before Clipping: 6dBu

Nominal Input Level: -18dBu (CC), -12dBu (RTS-TW)

Input Impedance: >= 10KO bridging

Route to 4-wire input at 0dBu in: Frequency Response: 100Hz - 10kHz ±3dB

Distortion: <0.2% THD @ 1kHz

Noise: <-55dBu

Route from a 4-wire output at 0dBu out: Frequency Response: 40Hz - 10kHz ±3dB

Distortion: <0.2% THD @ 1kHz

Noise: <-75dBu


2.2 x 7.4 x 1.5in (HxWxD)

(57 x 187 x 39mm)


13oz (0.38kg)

Network Specifications (Firmware Version 4.2+)
Network Protocols

Ethernet IPv4–Unicast Audio and Control mDNS–Multicast Device Discovery

Layer 3–Routable with mDNS function limitations

HTTP–Management RTP–Audio Transport

WavPack–Audio Codec

Network Ports


Port 80 TCP–System Management

Port 6001 TCP–System Management

Port 6001 UDP–Audio Streams


Port 5353 UDP–mDNS, Names, Discovery

Network Parameters

HMS-4X Endpoint Resource Use: 1 per active port

Bandwidth: 300 (max) kbps from each active port to HMS 1200 (max) kbps from HMS to each active port

Network Jitter Tolerance:<= 128ms jitter buffer per audio stream receiver automatically adjusted to network performance

QoS Tags: DSCP=41, Assured Forwarding (AF)

System reserved IP range: for endpoints


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