GW600 is a multi-functional caller display telephone chip, supporting DTMF/FSK dual-mode automatic caller display, dynamic incoming and outgoing call records, calendar, calculator, IP card dialing management, P/T dialing, LCD display driver, ringing generator, lock 0/lock 09/lock 019/full lock, built-in 16 music HOLD functions, and can store 200 groups of incoming calls, 80 groups of outgoing calls, 16 groups of single key memories or 10 groups of double key and 6 groups of 32-bit IP card numbers.