UNI‑T UT681C Cable/Line Tester (MIE0345)

The UNI‑T UT681C (catalog code MIE0345) is a compact and practical cable tester designed for technicians working with network or telephone wiring. It supports RJ45, RJ11 and BNC termination testing, and comes with a transmitter and receiver unit for checking continuity, shorts, open circuits or crossed pairs. :contentReference[oaicite:1]{index=1}

Key Features

• Connector support: RJ45 (Ethernet), RJ11 (phone) and BNC‑coaxial (via adaptor) connectors. :contentReference[oaicite:2]{index=2}
• Test modes: Fast‑mode and Slow‑mode cable testing (LED1‑LED8 + LED_G indicators) for quick check or detailed wiring view. :contentReference[oaicite:3]{index=3}
• Detects faults: Can identify open circuits, short circuits, crossed pairs or mis‑wired cables. :contentReference[oaicite:4]{index=4}
• Shielded/unshielded support: Compatible with both shielded and unshielded Ethernet cables. :contentReference[oaicite:5]{index=5}
• Auto shut‑off: Automatically powers off after ~10 minutes of idle to save battery. Manual off also possible. :contentReference[oaicite:6]{index=6}
• Battery low indicator: Warns when the 9V battery falls below ~7.2 V. :contentReference[oaicite:7]{index=7}

Specifications (Selected)

• Transmitter size: Approx. 102 × 62 × 28 mm. :contentReference[oaicite:8]{index=8}
• Receiver size: Approx. 102 × 37 × 28 mm. :contentReference[oaicite:9]{index=9}
• Transmitter weight: ~ 87 g; Receiver weight: ~ 51 g. :contentReference[oaicite:10]{index=10}
• Power supply: 9 V battery (6F22) included. :contentReference[oaicite:11]{index=11}
• Operating temperature: 0–40 °C working; storage: –10–50 °C. :contentReference[oaicite:12]{index=12}
• Certifications: CE, UKCA. :contentReference[oaicite:13]{index=13}

Why Choose the UT681C?

• Offers a simple and robust solution for verifying network and telephone cabling for installers, technicians or maintenance staff.
• Supports multiple connector types (RJ45, RJ11, BNC with adaptor) which increases its usefulness across different wiring types and systems.
• Compact transmitter/receiver design and LED indicators allow slipping into cable racks, patch panels or tight spaces with ease.

Usage & Considerations

• This tool **tests wiring continuity and structure**, but does *not* measure signal quality, bandwidth or data transmission performance of Ethernet lines.
• For BNC‑coaxial testing you’ll need the RJ45‑to‑BNC adaptor included (or supplied). :contentReference[oaicite:14]{index=14}
• Ensure the 9 V battery is sufficiently charged for accurate results — low battery can cause incorrect readings. :contentReference[oaicite:15]{index=15}

Keywords

UNI‑T UT681C, MIE0345 cable tester, RJ45 RJ11 BNC tester, Ethernet phone cable tester, continuity tester network cable