400电话深知功能对企业的重要性，因此10多年来，投入大量的人力和物力，自主研发了如云CRM、群发短信、电话会议、视频会议、企业OA、企信IM等独家功能，这些功能让400电话突破了原有的功能限定，全方位帮助企业提升销售业绩，提高工作效率，降低企业成本。办理一个400电话相当于建立一个呼叫中心，所以，400电话又被称为小型的呼叫中心。
400 telephones are well aware of the importance of functions to enterprises, so over the past 10 years, they have invested a lot of manpower and material resources to independently develop such exclusive functions as cloud CRM, group text messaging, teleconferencing, video conferencing, enterprise OA, enterprise credit IM and so on. These functions enable 400 telephones to break through the original functional limitations and help enterprises improve sales in an all-round way. Performance, improve work efficiency, reduce enterprise costs. Handling a 400 phone is equivalent to building a call center, so a 400 phone is also called a small call center.