2-Channel Full-duplex Digital Beltpack


  • Backlit keys with high visibility OLED displays for ease of use
  • 2 Keysets freely assignable to system channels
  • Stacked keys allow unique combination of channels
  • Independent Program Audio control
  • USB call signal flasher
  • Binaural controls on HXII-BP-X5


  • Powerline connection via XLR cable
  • Ethernet Network port with PoE


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

The HelixNet System 

  • Networked Intercom System
  • Flexible cabling
  • 12 partyline channels; expandable to 24 channels via optional license
  • Program Audio distribution with independent level controls

Effortless Management 

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


For Powerline daisy-chaining:

The HelixNet HXII-BP beltpack is a two-channel intercom user station supported by the HMS-4X main station.

Note: Access the HelixNet Cabling Calculator to calculate estimated maximum cable length for a single Clear-Com HelixNet digital partyline connection.

The HelixNet IP networking guide provides specifications, best practices and guidance for the integration of HelixNet into an existing or new IP network.

Technical Specifications


System provides 12 or 24 intercom channels. Multiple channels can be assigned or stacked to either beltpack keyset. System Program Audio can be associated with any channel with independent endpoint level control.


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:

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

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


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 (Version 4.2+)
Network Protocols

Ethernet IPv4–Unicast Audio and Control
mDNS–Multicast Device Discovery
Layer 3 routable with mDNS function
RTP–Audio Transport
WavPack–Audio Codec

Network Ports

Port 80 TCP–System Management
Port 6001 TCP–System Management
Port 6001 UDP–Audio Streams
Multicast: 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)
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

Associated Products

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