Channels

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.

Connectors

XLR Powerline: Powerline, 3-pin XLR-F

LAN/PoE: RJ45 etherCON

Headset: 4-pin XLR or 5-pin XLR-F

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): 0.09 A

Power (Max): 4 W

BTU (Max): 13 BTU/hr

This unit can be powered via:

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.

PoE – Power over Ethernet:

IEEE 802.3af-2003 – Class 1

PSE: 4.0 W DC max @ Power Source Requirement

PD: 3.84 W DC max @ Powered Device Draw

Environmental

32°F to +104°F (0°C to +40°C)

0 – 90% relative humidity

IP-53 rated

Dimensions

 5.3 x 3.9 x 1.7 in (HxWxD)

(135 x 99 x 43 mm)

Weight

12.2 oz (0.35 kg)

Network Specifications (Version 4)

Network Protocols

Ethernet IPv4 – Unicast Audio and Control

mDNS – Multicast Device Discovery

Layer 3 routable with mDNS function limitations

WavPack – Audio Codec

Network Ports

Unicast:

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)

Bandwidth:

300 (max) kbps from each active audio input 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=46, High Priority / Expedited Forwarding (EF)

Link-Local Default IP Address Range: 169.254.0.0/16

System Reserved IP Range: 10.0.0.0/8 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