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This product is a special buy-in. Special buy-in products are goods specially bought in on customer's request. After acceptance, special buy-in products cannot be cancelled or the goods returned, unless Radio Parts and its supplier agrees to the cancellation of the corresponding order and return of goods. Prices are subject to change and in the event that our purchase price has changed, we will notify you before finalising your order. Please call us on 1800 337 366 for availability, ETA or if you have further questions.
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TS®25D Test Sets
  • The TS®25D features data lockout and lockout override, and a large LCD. 
At a Glance
  • Caller ID and Call Waiting Caller ID
  • Amplified speakers for hands-free monitoring 
  • Data lockout and data lockout override 
  • Tone generator for wire identification 
  • Talk Battery to power voice conversation on dry (non-powered) lines 
  • Easy to read oversized liquid crystal display
Product Capabilities
  • This feature-rich test set is a necessity for a variety of installs. 
  • The TS25D Test Set features data lockout and lockout override, making you completely safe in talk or monitor mode. 
  • The DSL/POTS filtering technology allows you to safelydraw dial tone without downing DSL.
  • A built-in analog tone generator simplifies wire identification with a probe. 
  • An amplified speaker makes monitoring the line hands-free, so you can keep working. 
  • The talk battery function provides voltage to carry voice conversation on non-powered pairs.
  • All in a compact unit with an oversized robust liquid crystal display (LCD) that makes the intuitive, common-sensemenus easy-to-read and use.
  • Return Loss >14 dB (ref 600 Ω)
DC Resistance 
  • Off-Hook 150 Ω nominal
  • On-Hook  >1 MΩ 
AC Impedance
  • Off-Hook 600 Ω nominal; 300 Hz to 3400 Hz
  • On-Hook >120 kΩ; 300 Hz to 3400 Hz 
Rotary Dial Output
  • Pulsing Rate 10 pps ±1 pps 
  • Break/Make Ratio 60/40 
  • Interdigit  >300 ms 
  • Interval Resistance During Break  >100 kΩ
 DTMF Output
  • Tone Frequency Error ±1.5 % maximum 
  • Tone Level  –1 dBm combined (typical) 
  • High versus Low Tone difference  2 dB ± 2 dB
Memory Dialing
  • Memory Capacity  10 speed dial memories plus one last number redial memory
  • Digit Capacity  23 digits per memory 
  • Pause Duration  User programmable Default: 4 seconds 
  • Hook Flash Duration User programmable Default: 600 ms 
  • Automatic Speaker Shut Off Duration  User programmable TS25D default: 5 minutes TS25D CO default: 2 minutes 
  • Battery  9 V alkaline or lithium battery
  •  Measurement 7.8 in x 2.7 in x 1.6 in (20 cm x 6.8 cm x 4 cm) 
  •  Weight  10 ounces (284 g)
  •  Temperature Range Operating 32°F to 122 °F (0 °C to 50 °C) 
  • Storage  -40 °F to 150 °F (-40 °C to 65 °C) 
  • Altitude  Up to 10,000 ft (3,000 m) 
  • Relative Humidity  5 % to 95 %
Certifications and Compliance Conformité Européenne. Conforms to relevant European Union directives.