17KX-TG6841B/KX-TG6842B/KX-TG6843B/KX-TG6844B/KX-TG6845B/KX-TG6873B/KX-TGA680B4.4.7. Calling Line Identification (Caller ID)/Call Waiting Caller IDFunction:Caller IDThe caller ID is a chargeable ID which the user of a telephone circuit obtains by entering a contract with the telephone companyto utilize a caller ID service. For this reason, the operation of this circuit assumes that a caller ID service contract has beenentered for the circuit being used. The data for the caller ID from the telephone exchange is sent during the interval between thefirst and second rings of the bell signal. The data from the telephone exchange is a modem signal which is modulated in an FSK(Frequency Shift Keying) * format. Data "1" is a 1200 Hz sine wave, and data " 0" is a 2200 Hz sine wave. There are two types ofthe message format which can be received: i.e. the single message format and plural message format. The plural messageformat allows to transmit the name and data code information in addition to the time and telephone number data.*: Also the telephone exchange service provides other formats.1st Ring2 sec Silent interval 4 sec2nd Ring2 sec0.5 s 575 ms min 0.5 sDATA0.1 VrmsSTD Ring / 20 HzTip-RingDATA inAB DATA out1200 Hz=DATA "1"1 bit=833 μs2200 Hz=DATA "0 "70 Vrmsmonth day hour minute number201348700035161504Single message formatPlural message format1st Ring2 sec718 ms 2nd Ring0.5 sDATAmonth day hour minute number20134870003516 16DATA CODE NAME201 John Smith 04
