Lineman Test Set(หูตรวจแก้โทรศัพท์)
for installation, maintenance and connection to telephone lines.
Features:
- Talk / Of f/ Monitor switch
- DTMF / Pulse switch
- Last number redial in DTMF or Pulse (31 digits)
- Polarity Test Key - Visual indication LED red/green
- High Impedance Monitor (>120Kohm)