> ## Documentation Index
> Fetch the complete documentation index at: https://docs.solidyne.ar/llms.txt
> Use this file to discover all available pages before exploring further.

# Specifications

<Accordion title="I/O Connectors">
  * **1/4" (6.32mm) stereo jack**
  * **AUDIO OUT**
    * TIP = Audio A / Audio A+B @ +4 dBu
    * RING = Audio B @ +4 dBu
  * **AUDIO IN**
    * TIP = Audio return from console (Mix-Minus) -10 dBu \~ +10 dBu
    * RING = TELCO output to Solidyne 'EXT HYBRID'
</Accordion>

<Accordion title="Operation Modes">
  * **MODE A 'Solidyne Consoles'**
    * Cellphones A and B in conference with console's internal hybrids.
    * DIP-2,4,5,6 = ON
    * Uses 1.80m stereo cable (supplied) from AUDIO IN (BLT200) to EXT HYB connector on Solidyne console.
  * **MODE B 'All consoles; 1 line input'**
    * All consoles in conference mode. DIP-2,4,5 = ON
    * **AUDIO IN**: stereo cable (supplied), Tip = return from console / Ring = n/c
    * **AUDIO OUT**: Y-cable (supplied), Tip = console line input / Ring = n/c
  * **MODE C 'All consoles; 2 line inputs'**
    * Conference mode. DIP-1,4,5 = ON
    * **AUDIO IN**: stereo cable (supplied), Tip = return from console.
    * **AUDIO OUT**: Y-cable (supplied), Tip = Line A / Ring = Line B.
  * **MODE D 'Independent cellphones'**
    * No conference. DIP-1 = ON
    * **AUDIO IN**: stereo cable (supplied), Tip = return from console.
    * **AUDIO OUT**: Y-cable (supplied), Tip = Line A / Ring = Line B.
  * **MODE E '2 × BLT200' (4 cellphones)**
    * Two BLT200 units, each in A/B conference mode. DIP-2,4,5 = ON
    * Connection as per MODE B wiring: Line 1 (Cell 1+2) and Line 2 (Cell 3+4).
    * Connect the two return bus inputs in parallel using a Y-adapter.
</Accordion>

<Accordion title="CONTROL Button Lighting Codes">
  * **A – Cellphone on hold**: brief yellow light (1 s) with long off period (2 s).
  * **B – Cellphone in communication**: slow yellow light (2 s) with short off period (1 s).
    * Indicates ongoing interview or searching for a previously paired device.
    * Returns to mode "A" when communication is ended (short press).
  * **C – Pairing mode**: very fast yellow flashing.
  * **D – Incoming call**: solid blue light while phone is ringing.
</Accordion>

<Accordion title="Audio Performance">
  * Frequency response: 50 Hz – 8,000 Hz (full voice range, Bluetooth 4.0 / 5.0)
  * Total Harmonic Distortion (THD): \< 0.2% (measured input → output in electronic circuits)
  * Signal-to-noise ratio: > 70 dBA (in all electronic circuits)
</Accordion>

<Accordion title="Power Supply">
  * External switching power supply
  * 110/220V AC → 12V DC / 1A
</Accordion>