Butt Set


Proskit MT-8100, Butt Set


  • Complied with IP54 Dustproof & Waterproof tests
  • Drop Protection
  • CE approved
  • High impedance monitor
  • Outer-lead voltage LED indicators
  • On/off checking feature checks out if telecom line is connected well.
  • Continuous polarity LED indicators.
  • Speakerphone for convenient hands-free two-way conversation
  • Tone and pulse operation
  • Store up to twelve 16-digit numbers in the repeat dialer (speed dialing), plus extra numbers stored in the M1 button.
  • The last number redial feature.
  • PBX pause button.
  • Mute switch
  • An electronic switch controls the volume of the speakerphone/monitor.
  • The automatic shut-off feature turns off the speaker after five minutes of inactivity
  • Battery low-voltage LED indictors
  • Audible electronic ringer
  • Relocatable steel locking belt clip
  • Angled Bed of Nails allows it to stab into the cable, and the auxiliary RJ-11Modular plug can be inserted directly into the telecom jack.


Loop limit2 KΩ maximum at 48 VDC
(nominal 20 mA minimum loop current)
DC resistance
Talk mode300Ω typical
Monitor impedance39kΩ nominal at 1 kHz
Rotary dial output
Pulsing rate10pps+0.8pps
Percent break61%±2%
Interdigit interval1000 ms typical
Leakage during Break>50 kΩ
DTMF output
Tone frequency error±1.2% maximum
Tone level-8±2dBm combined (typical)
High versus low tone difference4 dB maximum
Memory dialing
Memory capacity13 memories including M1, last number redialing
Digit capacity16 digits per memory
PBX pause duration4 seconds
Line voltage test5 Phase AC/DC voltage
indication (under24V,24~100V,101~150V, 151~200V,more than 200V)
Monitor amplifier9V transistor; provides 25 hours continuous use, typical
Power sourceContinuous use, typical
Automatic power shut off(Monitor type)After 5 min. of no audio signal
Speaker phone levelsElectronically adjustable
Power sourceBattery (9V) 6F22 (Not included)
Measurement230 ×82 × 89mm
(9-1/16” × 3-15/64” × 3-1/2”)
Weight635g typical
Water resistanceDust protection & Waterproof tested to an IEC/EN 60529 IP54 rating
Cord setsAngled bed of nails and RJ11 plug
TemperatureOperating: 0 to 50°C
Storage:-10 to 60°C
AltitudeTo 10,000 feet (3,000M) max
Relative humidity5 To 95%