Key Features HL240-VQ
Connectivity
- Land lines (POTS): 2 analog hybrids with adjustable rejection.
- Bluetooth 4.0: two independent channels with HSP/HFP/A2DP profiles.
- VoIP compatibility: via ATA adapters or VoIP phones with Bluetooth.
- Solidyne console interface: direct hybrid send/return connection (2300, 2600, DX816/822, D612 series).
Inputs and Outputs
- AUDIO IN input (Send to Lines): unbalanced, for mix-minus feed from the console.
- AUDIO OUT output (Mix): balanced XLR, delivers the total line mix.
- Direct outputs PH-1 and BLT-1: unbalanced, pre-fader, with fixed level.
- Headphone output: direct monitoring of the main mix.
Audio Processing
- VQR (Voice Quality Restoration): bass reconstruction up to 50 Hz and treble up to 12 kHz.
- NOISE Control: noise gate to reduce background noise during conversation pauses.
Operation
- Illuminated buttons: line status and ring cadence.
- Integrated talkback: allows private conversation with the caller.
- Priority system: attenuates line audio by 10 dB when local voice is detected.
- Conference: internal mixing of up to 4 lines (2 POTS + 2 Bluetooth).
Performance
- Frequency response: 50 Hz – 12 kHz with VQR // 300 Hz – 3.4 kHz without VQR.
- Signal-to-noise ratio: 70 dBA with VQR.
- THD: < 0.2 %.
- Hybrid rejection: > 40 dB (measured with 2 km artificial line).
Construction and Power Supply
- 19” rack-mount format: 1U height. Includes rubber feet for desktop use.
- Internal stabilized power supply: Switchable 110/220 V, 20 W power consumption.
- Surge protection: Metal oxide varistors rated for up to 2,000 V.