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Yellow handheld telephone test set with angled bed-of-nails clips, earpiece, and pouch

FLUKE networks

FLUKE networks 25501109 TS25D telephone tester

SKU CH-5Y4D-ZW37B MPN 25501109

Tests telephone lines for dial tone, polarity, voltage, current, and Caller-ID with built-in tone generator, amplified speaker, and ten-number speed-dial memory

  • SpecificationsNumber of Batteries Supported:1 Product Type:Testing Device
  • FeaturesBattery Chemistry:Alkaline Lithium Ion (Li-Ion)
  • Package ContentsTS 25D Test Sets Device Tester Pouch Earpiece
  • Detects dial tone and polarity for line verification
  • Built-in tone generator simplifies wire identification
  • Caller-ID and Call Waiting Caller-ID display incoming data
  • Monitors lines without disruption and stores up to ten 23-digit numbers
  • Amplified speaker enables hands-free listening during testing

Telephone Test Set with Angled Bed-of-Nails Clips

The Fluke Networks TS25D is a feature-rich telephone test set designed for technicians who install and maintain voice and data lines. It detects dial tone and polarity, places and receives calls, and indicates line voltage and current. A one-way amplified speaker allows hands-free monitoring while you work.

Install with included pouch and earpiece

The unit ships with a pouch, earpiece, and 6-wire in-line modular adapter so you can start testing straight away. Menus are driven by an oversized LCD and a keypad with standard dialing and function keys. The device supports a single alkaline or lithium-ion battery for power.

Verify you need analog line testing

This set is built for POTS and DSL-filtered environments, storing up to ten 23-digit numbers for speed dialing. It monitors lines without disrupting service and remains on hook if data is detected. Buyers who require digital protocol analysis or fibre-optic testing should look elsewhere.

Highlights

  • Detects dial tone and polarity for line verification
  • Built-in tone generator simplifies wire identification
  • Caller-ID and Call Waiting Caller-ID display incoming data
  • Monitors lines without disruption and stores up to ten 23-digit numbers
  • Amplified speaker enables hands-free listening during testing

Specifications

BrandFluke Networks
Model25D
SpecificationsNumber of Batteries Supported:1
Product Type:Testing Device
FeaturesBattery Chemistry:Alkaline
Lithium Ion (Li-Ion)
Package ContentsTS 25D Test Sets Device Tester
Pouch
Earpiece
Shipping weight1.36 kg
Package size198 × 69 × 41 mm

Questions about this item

How can I confirm the TS25D is working correctly after connecting it to a line?

The large LCD will show line voltage and current readings, dial tone and polarity status, and Caller-ID data if present; the one-way amplified speaker lets you hear the line hands-free to verify operation.

What accessories are included with the TS25D and what must I supply?

The box contains the TS25D test set, angled bed-of-nails clips, an earpiece, a 6-wire in-line modular adapter and a pouch; you must provide one alkaline or Li-Ion battery as the unit supports a single battery.

Which version of the Fluke Networks telephone test set should I choose for DSL-safe testing and speed-dial storage?

The TS25D model 25501109 includes DSL/POTS filtering to protect DSL service, data lockout with override, and memory for up to ten 23-digit speed-dial numbers.

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