Talk/Listen Buttons: 32
Function Buttons: 4
Answer Back Button: 1
Clear Button: 1
Volume Controls: 2 (Main and vol/prog)
Headset Connector: 1 (XLR-4M)
Panel Mic Connector: 1 locking 1/4 in.phone jack
To Matrix: RJ-45 DB-15F
Expansion: RJ-45
Power: 3-pin EIA connector
Earphone Impedence: From 50 0hms
Output Power: 0.5W into 50 Ohms for <1% distortion
Frequency Response: 40Hz-20KHz +/- 3dB
Type: Electret
Level: -40 dBu
Impedence: 200 0hms +/-10%
Type: Dynamic
Level: -55-0dBu
Voltage: 90/240 VAC +/- 10%
Frequency: 50-60Hz
Power: 50 W maximum
Operating: 32°-125° F (0°-50° C)
Storage: 32°-150° F (0°-70° C)
Humidity: Between 20% and 90%, non-condensing
1.75 x 19 x 8.25 in (HxWxD)
(45 x 482 x 210 mm)
7.5 lbs (3.4 kg)