Along with the rapid development of mobile internet

operator’s triditional communition business could not meet the needs of users anymore

very hard to compete with OTT business. In this circumstance

converged communications

with Vo LTE as core feature

became the key method for operators to stop gliding and reform to develope. This article deeply analyzed the developing model of converged communications

compared with the business and techinique details of traditional communication and OTT

coming to the conclusion of the challenge and stratige for operator to develop converged communications.