ALCON CT-458 Y Telephone line and intercom wireless radio transfer system up to 100km NLOS Estimated range is a result of our testing and match real life performance: Range without line of sight is up to 100 km. Max Range with line of sight is up to 150 km! Transfers your phone lend-line (PSTN), VoIP signal, Fax, GSM Signal, Dial up internet (18-28 kbps) or PBX extension up to 100 km away. Works on any analog line port (PBX, VOIP, PSTN, FXS or POTS) No software setup / easy installation The line of sight is not necessary for range Reliable and simple to use Up to 4 Remote Units or portable Handsets per one base 45 W Base unit 45 W Remote unit Universal interface on the remote / mobile for fax / data or other alcon c4uUp to 4 remote units or portable handsets on one base Intercom connection between base and remote or portable handsets Economical and easy to use Excellent signal quality for long range use RF stability & durability Scrambler function 20 channels frequency auto scan Two-way paging & intercom Security: Multiple Channel Access: 20 channels automatic scan to avoid interference Built-in voice security circuit (Scrambler). Works on two frequencies in the same time : 382.100MHz / 256.100MHz