| 摘要 |
So that any messaging platform 27, 28, can be used for storing messages by any customer and common messaging protocols may be used, the messaging system is controlled by service switching function (SSF) 22 and service control function (SCF) 23. These may be located in different parts of the network. On detection of a messaging service request, the SSF alerts the SCF through signalling paths of the network through local exchange 16 and digital main switching unit (DMSU) 17. The SCF takes control of the customer call and using data held in a service data store 24, provides appropriate prompts, access control and storage. Messages are stored in a distributed manner with sequential messages for the same customer not necessarily being held in the same messaging platform, only the location of each message being held in service data function (SDF) 24. Fax, voice, data and E-mail messages may all be stored in the same manner. |
