| Hãng sản xuất | Fluke |
| Specifications | |
| Line current range | Off-hook: 10 to 100mA |
| DC resistance | Off-hook: 150Ω (nominal); on-hook: greater than 3MΩ |
| AC impedance | Off-hook: 600Ω (nominal), 300 to 3,400 Hz; on-hook: greater than 120kΩ, 300 to 3,400 Hz |
| Rotary dial pulse rate | 10 + or – 1 pulses per second |
| DTMF (dual-tone multi-frequency) tone frequency error | + or – 1.5% maximum |
| Memory capacity | Ten 23-digit speed-dial numbers, one redial number |
| Power source | Shared line power; 9V alkaline battery (included) for test set when on-hook and for speaker when off-hook |
| Dimensions | 254 x 96 x 107mm/10 x 3.75 x 4.25 inches (H x W x D) |
| Weight | 0.68kg/1.5lb. |
| Specifications | |
| Line current range | Off-hook: 10 to 100mA |
| DC resistance | Off-hook: 150Ω (nominal); on-hook: greater than 3MΩ |
| AC impedance | Off-hook: 600Ω (nominal), 300 to 3,400 Hz; on-hook: greater than 120kΩ, 300 to 3,400 Hz |
| Rotary dial pulse rate | 10 + or – 1 pulses per second |
| DTMF (dual-tone multi-frequency) tone frequency error | + or – 1.5% maximum |
| Memory capacity | Ten 23-digit speed-dial numbers, one redial number |
| Power source | Shared line power; 9V alkaline battery (included) for test set when on-hook and for speaker when off-hook |
| Dimensions | 254 x 96 x 107mm/10 x 3.75 x 4.25 inches (H x W x D) |
| Weight | 0.68kg/1.5lb. |