What application services does the SPC switching system mainly provide?

Program-controlled computer is a switching device used in telephone switching network. It controls telephone connections through computer programs. Its main functions are subscriber line access, relay connection, billing and equipment management. On the basis of program-controlled computers, IP PBX applies VoIP, integrates IPT advanced services, and handles multimedia resources. It can be linked with IP and digital devices, managed in a unified way, and has rich expansibility. The following are the main differences between them: transmission medium and terminal type: program-controlled switch adopts narrowband+analog line+analog phone; IP PBX adopts narrowband+broadband/digital lines (Ethernet, etc.). )+analog line+analog phone +IP phone+handheld terminal +PC soft terminal. Relay type: the program controller adopts analog relay mode; IP PBX can use analog trunking+digital trunking (IP protocol). Deployment mode: program-controlled single machine; IP PBX single machine, dual machine redundancy, dual main control board, local regeneration, power outage escape. Service type: SPC exchange can mainly provide virtual switchboard, IVR voice navigation, attendant console, VMS voice mail, fax, voice conference, etc. IP PBX can provide automatic/customized switchboard, IVR, switchboard, VMS, fax, multimedia conference (audio and video, desktop * * *, instant messaging, document whiteboard * *) and so on. ), enterprise address book, number one service, secretarial service, intelligent routing, etc., and hundreds of auxiliary services. If nothing else, IP PBX will completely replace the traditional telephone switching network. The so-called waves behind the Yangtze River push the waves ahead.