The PT-90 1501 PBX and IPPBX all-in-one machine fully absorbs the advantages of many digital switches at home and abroad on the basis of sufficient market research and accumulation of communication product development and production technology, using embedded technology, modular design, and complying with ITU. The technical requirements of the -T Recommendation, using the most advanced FPGA technology, patch technology, development and production of a new generation of IPPBX multimedia exchange platform that truly meets the needs of users.