Product description:
The main function
1. the whole cord non-blocking exchange.
2.call display function (FSK and DTMF double system compatible).
3. automatic IP phone exhaled, cost savings.
4.exterior line incoming call can direct extension, can be recorded since the 2 section of the voice prompt.
5.breathe more level restrictions; Breathe out time limit; Dial the code limit limits; Password restrictions; Charter code restrictions.
6.can set a variety of flexible service function; Exhale hotline; Don't disturb busy callback; Displacement transfer; Busy a times; Answer the ringing, generation dial perimeter; Secretarial services;
Rp evictions outside threats music choice.