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The HXII-BP beltpack is a two-channel intercom user station.



  • Easy to use front panel with OLED display & backlit keys
  • 2 Keysets assignable to channels
  • Stacked keys allow unique combination of channels
  • Independent Program Audio control
  • USB call signal flasher
  • Binaural controls on HXII-BP-X5


  • Ethernet Network port with PoE(1)
  • Powerline via XLR cable to HMS-4X(2/3)


  • Multiple mounting options
  • Rugged, lightweight polycarbonate enclosure
  • IP53 environmental rating

The HelixNet System 

  • Wired Partyline - Networked
  • Hosted by Arcadia or HMS-4X(3)
  • Up to 24 Channels – Licensed
  • Up to 64 HelixNet Endpoints
  • Program Audio user level control

Effortless Management 

  • Easy to use CCM browser configuration
  • Fast front panel control & configuration
  • Central discovery & pairing on Arcadia
  • Plug-and-go powerline to HMS-4X(2/3)
  • Central firmware upgrades from host

Item Code



For Powerline daisy-chaining, the following must be ordered: SP-2


HelixNet System Hosts

Arcadia: Supports up to 64 HelixNet endpoints (HRM-4X, HKB-2X & HXII-BP) over Ethernet. Up to 24 Channels can be HelixNet Enabled using a Licensed Port for assignment to any HelixNet endpoints keyset.

HMS-4X: Supports up to 64 endpoints (HRM-4X, HKB-2X, HBP-2X, HXII-BP, HLI-2W2, HLI-4W2, LQ port). User stations can connect via the 2 Powerlines (note power and data limits) or over Ethernet via optional HLI-ET2 module. HMS allows use of 12 channels which can be expanded to 24 using optional license.


XLR Powerline**: 3-pin XLR-F

LAN/PoE: RJ45 etherCON

Headset: 4-pin XLR-M (-X4) or 5-pin XLR-F (-X5)

USB: Micro AB

Microphone Pre-Amplifier

Headset Mic Impedance: 200Ω (Dynamic)

Headset Mic Voltage: 1.7V (Electret selectable)

Limiter: +23dB

Route to 4-wire output at 0dBu out: Mic Gain: 60dB (Dynamic), 45dB (Electret)

Frequency Response: 300Hz – 10 kHz ± 3dB, contoured for intelligibility

Distortion: <0.2% THD @ 1kHz

Noise: <-55dBu (Dynamic), <-65dBu (Electret)

Headphone Amplifier

Load Impedance: >32Ω 

Output Level: +12dBu before clipping

Sidetone: -12dB (selectable)

Route from a 4-wire input at 0dBu in: Max Gain: 0dB

Frequency Response: 40Hz - 10kHz ±3dB

Distortion: <0.2% THD @ 1kHz

Noise: -65dBu

Headphone Limiter: 0dB (selectable)

Device Power

Voltage: 48V DC

Current (Max): 0.09A

Power (Max): 4W

BTU (Max): 13BTU/hr

This unit can be powered via: PoE - Power over Ethernet*: IEEE 802.3af-2003 - Class 1

PSE: 4.0W DC max @ Power Source Req.

PD: 3.84W DC max @ Powered Device Draw

Powerline**: Input Voltage: ±29.5V DC

Input Current (Max): 0.13A

Powerline Utilization: HXII-BP = 1 beltpack Note the maximum Powerline capacity of the HMS-4X Use HelixNet Cable Calculator to validate load and cable distance.


32° to +104°F (0° to +40°C) 0 - 90% relative humidity IP53 rated


3.9 x 5.3 x 1.7in (WxHxD)

99 x 135 x 43mm (WxHxD)


12.2oz (0.35kg)

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, Linking Optional for device names and linking

Network Parameters

Endpoint Resource Use: 1 (-X4 variant)

Endpoint Resource Use: 2 (-X5 for binaural)

Bandwidth: 300 (max) kbps from each HXII-BP to HMS 1200 (max) kbps from HMS to each endpoint

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

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

Link-Local Default IP Address Range:

System Reserved IP Range: for endpoints

Recommended Ethernet Switches

• Managed Ethernet Switch – Layer 3

• 100/1000 Base-T ports for endpoints

• 1000 Base IP Trunks between switches

• QoS configuration

• Energy Efficient Ethernet bypass option

• IGMP Snooping bypass option

Please refer to the Clear-Com HelixNet Network Guide for additional switch settings and network characteristics.

*Ethernet to HMS-4X requires HLI-ET2

**Not available for Arcadia. Contact Clear-Com

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