The TS25D features data lockout and lockout override, and a large LCD.

- 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

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 safely draw 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-sense menus easy-to-read and use.

Electrical Specifications
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 Interval: >300 ms
- 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