This manual explains how to install the CT‑C33 base unit and its handset, configure call functions such as three‑way conversation, automatic call back, and caller ID storage, and operate the device in normal and power‑failure conditions. It also lists environmental and electrical specifications, safety guidelines, and maintenance procedures.
Additional sections cover the device’s key functions, battery handling, antenna deployment, and detailed fault‑diagnosis steps to help users resolve common issues quickly. This manual is written in Japanese.
| Operating temperature | -10 °C to +40 °C |
|---|---|
| Relative humidity | 45 % to 95 % |
| Atmospheric pressure | 86 kPa to 106 kPa |
| Sound pressure level (base unit) | 70 dB |
| RF output power (base unit) | 20 mW |
| Operating frequency | 46 MHz / 49 MHz |
| Power input (base unit) | AC 110 V, 60 Hz |
| DC output (base unit) | 9 V DC, 200 mA |
| Handset battery | 3.6 V, 300 mAh |
Place the base unit in standby, press the call key on the handset, wait for the tone, then speak; the handset will automatically time the call and return to standby after hanging up.
The handset speaker remains functional during a power outage, and the base unit will continue the call for up to 30 seconds before switching to battery mode.
Both the base unit and handset can record up to 64 incoming caller IDs; press the designated key to view the stored numbers.
The device operates between –10 °C and +40 °C, with humidity from 45 % to 95 % and atmospheric pressure from 86 kPa to 106 kPa.