Clear-Com HB-704, 4 Ch. flush-mount headset station

Clear-Com HB-704, 4 Ch. flush-mount headset station

Clear-Com HB-704 features a microprocessor-controlled logic with internal and external controls allow users to adjust functions on each channel. HB-704 also features the 4-wire optional daughter board converts the station to accept 4-wire connections, allowing the station to operate via fiber optic cable and other 4-wire devices over longer distances.

4 Ch. flush-mount headset station: 
Encore four-channel selectable flush-mount headset station. Mounts in console or standard two-gang electrical box. Includes a Four-pin male headset connector.

Clear-Com HB-704 Product Features

• 4-Channel Remote Headset Station
• Momentary/Latching Talk switch with LED
• Microprocessor controlled logic and switching
• Visual call signaling
• Headset connector with volume control and sidetone adjust
• Optional 4-wire or TW daughter boards for flexibility
• Mountable into a standard US two-gang outlet box
• Selectable Full-Duplex Communication
• Expand Capabilities

Headset Microphone Input
Input Type :Dynamic

Input Impedance: >= 1K

Mic Limiter Threshold: -2dBu ± 3dB

Mic Limiter Range: >= 15dB

Program Line Input
Input Impedance: >= 5K

Headset Output
Load Impedance: >= 8

Output Impedance: <= 25

Output Limiter Threshold: +5dBu ± 3dB

Maximum Output Level before Distortion: >= 17dBu

Partyline Output
Off Noise: < -74dBu

Output Impedance: >10K

Partyline Input
Crosstalk: < -60dB

Max level before Clipping: >= 12dBu

Frequency Response
Headset Mic – Partyline: 300 – 15KHz ± 3dB

Partyline – Headset Out: 300 – 15KHz ± 3dB

Max Distortion
Headset Mic – Partyline: <= 0.5%

Partyline – Headset Out: <= 0.2%

Noise
Headset Mic – Partyline: < -70dBu

Max Gain
Headset Mic – Partyline: 41dB ± 2dB

Partyline – Headset Out: >= 34dB

Power
Input Voltage Range: 20-30 VDC

Input Current (Idle):<= 50mA

Input Current (Max):<=100mA

Internal Adjustments and Connections
Intercom Line: Seven terminal connector

Option Switches: Two DIP switches

Option Board Jumper: Two sets of options jumpers

Environmental
32 – 122°F (0 – 50°C)

Dimensions
4.5 x 4.6 1.75 in (HxWxD)

(114 x 117 x 44 mm)

Weight
0.46 lb (0.21 kg)