DEVICE FOR SELECTING INCOMING SOUND OF WIRELESS SUBSCRIBER NETWORK DETACHABLE TERMINAL

摘要

PURPOSE: A device for selecting incoming sound of a wireless subscriber network detachable terminal, is provided to ring for selected subscribers when selecting specific subscribers by using dual tone multi frequency(DTMF) signals of subscribers. CONSTITUTION: A device for selecting incoming sound of a wireless subscriber network detachable terminal, comprises a radio frequency/intermediate frequency(RF/IF) sub-system(1), a base band analog processor(2), a mobile station modem(MSM,3), transistors(Q1-Q5), relays(R1-R5), a CODEC(11), a subscriber loop interface circuit(SLIC,4) and a dual tone multi frequency(DTMF) receiver(12). The RF/IF sub-system(1) amplifies a signal by being connected to an antenna. The base band analog processor(2) is connected to the RF/IF sub-system. The MSM(3) is a code division multiple access(CDMA) dedicated chip transceiving a signal with the RF/IF sub-system and the analog processor, The transistors(Q1-Q5) becomes switching-on/off by a control signal of the MSM. The relays(R1-R5) disconnect between the SLIC and telephone sets(10) in switching-on of the transistors. The CODEC(11) executes analog-to-digital(A/D), D/A converter, by being connected to the MSM. The SLIC(4) is connected to the telephone sets(10) through the relays. And, the DTMF receiver(12) receives a ring signal inputted through the SLIC to output to the MSM.