Abstract: The Mobile Subscriber Station paging system makes use of a Standalone Home Location Register SHLR, where the mobile subscriber station records are removed from the present Mobile Switching Center and placed on a processor that manages only the subscriber's records and does not process call service requests. The ANSI-41 standard is then adapted to add a new parameter (CALLTIMEFEATURE) which includes the information required to apply Short MIN paging to a mobile subscriber station when certain conditions are met. These conditions are: the mobile subscriber station is capable of responding to a Short MIN page (the last 24 bits that represent the last 7 digits of the mobile subscriber station number), and the System ID that is immutably entered into the mobile subscriber station is the same as the System ID that is being broadcast by the cell on the overhead message train.

Abstract: A system for expanding a parameter encoding field in a new communications protocol that is compatible with an old protocol. An unused command parameter in an old protocol is used to indicate an expanded parameter encoding field in a new protocol. Parameter encodings from the old protocol are unchanged in the new protocol. A system communicating using the old protocol recognizes all parameters from the old protocol and ignores parameters from the new protocol. A system communicating using the new protocol recognizes parameters from both the old and new protocols.