China (Mainland) Sr450 Rural Phone

Specifications: SR450 is a pair of duplex radio terminal set that can extend a phone line to 30-70km terminal connected to telephone line of PSTN,the other connected to a general phone set that is 30-70km away,through wireless duplex communication,you can use the phone just as it is connected with and MODEM are also is now most fitted for island,high mountains and anyplace that telephone lines cannot reach. *450M-460M band ,full duplex *distance 30-70 Km *voice,fax,modem support *general telephone interface *exact frequency with pll *parameters set with RS232c *easy to install