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1. Special smart IP card,4 group IP for choice
2. 1 service hotline, more convenient, pleasant to use the phone
3. FSK/DTMF dual system, EEPROM protect the number not to lose
4. 30 incoming call,10 outgoing call which can be called back, reviewed and deleted
5. 5 step LCD contrast for your various requirement
6. Dialing speed adjustable
7. Music on hold function
8. 32 digits redial function
9. 3 group alarm o’clock
caller ID phone/ office phone/ smart phone