Handset#
Tip
The speaker itself does not limit the acoustic level or is protected against overload. This protection circuit is implemented in the telephone. If you use the handset for other projects, you have to implement this protection circuit also.
This information is provided, if you like to use the handset for other projects (contact our sales).\ If like to use the handset interface for other hardware, like special headsets, please take a look at the headset interface also.
| Pin | Connected to |
|---|---|
| 1 | Microphone + |
| 2 | Speaker + |
| 3 | Speaker - |
| 4 | Microphone - |
Microphone#
| Item | Value | Unit |
|---|---|---|
| Sensitivity | -45 | dB (0 dB = 1V/Pa) |
| Impedance | 2.2 | kOhm |
| Operation voltage | 2 | V |
| Current consumption (max.) | 0,5 | mA |
Speaker#
| Item | Value | Unit |
|---|---|---|
| Sensitivity | 91 | dB (1 mW / 1 cm) |
| Impedance | 100 | Ohm |
| Power Rating | 0.03 | W (permanent) |
| Frequency Range | 70 - 10000 | Hz |
Info
The speaker is a standard electrodynamic speaker. It is expected to work with hearing aids with electrodynamic coupling (Telecoil), but has not yet been tested for this purpose.