Product type: Basic telephone / Condition: used - like new / Item no.: CX253isdn / Brand: Siemens / DECT standard is supported / GAP standard is supported / Number of channels: 120 / Radio frequency range: 1880-1900 MHz / Duplex method: time multiplex, 10 ms frame length / Channel grid: 1728 KHz / Bit rate: 1152 kbit/s / Modulation: GFSK / Voice coding: 32 kbit/s / Transmission power: 10 mW, average power per channel / Range: up to 300 m outdoors, up to 50 m in buildings / Power supply/base: 220/230V / 50Hz (plug-in power supply C39280-Z4-C501 / ISDN connection: Euro-ISDN multi-device connection IAE / Ambient conditions for operation: +5°C to +45°C; 20% to 75% relative humidity / Dialing method: DTMF (tone dialing) / IW (pulse dialing) / Dimensions: approx. Long 210 x Wide 245 x High 82 mm