{HEAD ~ The caller ID extracting part} analyzes a call incoming signal and extracts {TAIL ~ an area code} as the caller ID information 
{ HEAD ~ The caller ID extracting part } analyzes a call incoming signal and extracts { TAIL ~ an area code } as the caller ID information
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH