universal computer protocol (paging) (UCP)
The Universal Computer Protocol (UCP) is used to connect the Short Message Service Center(SMSC) with external personalcomputers in GSM paging systems.
Using the UCP protocol implemented in the External Machine Interface( EMI), a user can access the Short Message Service Center directly from his personal computer( PC), as well as Ermes-basedpaging systems. To provide access to the extended SMS commands, some SMSC-specific commands have been added to the UCP command structure.