Telex AUDIOCOM MS-2002 - Manual (Page 28)

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Connector Type: Uses same connectors as for balanced mode, above, but
without pinouts modified by BAL/UNBAL switch on back panel as
follows
XLR-3 Unbalanced Configuration Pinouts
Pin 1 Common
Pin 2 +24 VDC input
Pin 3 Intercom audio high
XLR-6 Unbalanced Configuration Pinouts
Pin 1 Common
Pin 2 Local Power (12 to 15 VDC, 65 to 150mA)
Pin 3 Channel 1 +24 VDC input
Pin 4 Channel 1 Intercom audio high and DC call
Pin 5 Channel 2 +24 VDC input
Pin 6 Channel 1 Intercom audio high and DC call
PA Output
Output Level:
235 mV RMS nominal
Connector Type: 3.5mm Stereo Phone Jack
Tip: PA output high
Ring: Not used
Sleeve: Common
Speaker Output
Output Level:
0dB nominal (1.0V RMS )
Output Impedance:
1000 Ohm nominal
Frequency Response:
200Hz to 8kHz +1/-3dB
Connector Type: RCA Phono Jack
Tip: Speaker output high
Sleeve: Common
Expansion Input/Output
Type:
3.5mm stereo phone jack
Tip: Tip Output
Ring: Listen input
Sleeve: Common
Headphone Amplifier
Voltage Gain:
30 ±3dB
Maximum Output:
250mW ±10% into 150 Ohm, 65mW ±10% into 600 Ohm
Frequency Response:
200Hz to 8kHz +1/-3dB
Incoming Call Beep Tone:
2kHz, at the headphones
Total Harmonic Distortion:
Less than 0.2% at 200mW
Sidetone:
18 ±dB, adjustable