1) Two way communication, arbitrary paging, group meetings;
2) Insertion and disassembly, call queuing, call recording;
3) Single point broadcasting, zone broadcasting;
4) Shouting broadcast, background music broadcast, text to speech broadcast;
5) Support unmanned operation, i.e. unconditional call forwarding function;
6) Supporting software interfaces with third-party platforms, the pipe gallery platform can obtain the status of the telephone system and take over the telephone system