Info

and stores this information in its temporary memory.

Step 2. The mobile then tunes to the strongest paging channel, waits for another overhead message, and compares the received system identifier (SID1) with the SID of its "home" system, which is stored in its semi-permanent memory. If the identifiers match, the MS is "at home." If not, MS informs its user by turning "on" its "roaming" light.

Step 3. The MS determines the first and last access channels from parameters CPA and CMAX-1. If CPA = 1, the system has combined access and paging channels, and the first and last access channels are the same as the first and last paging channels. If CPA = 0, the system has separate access and paging channels, and the first and last access channels are:

"A" Systems "B" Systems

First channel 333 -N 334 + TV

Last channel (333 - N - CMAX + 1) (334 + N + CMAX - 1)

The MS then stores the first and last access channel in its temporary memory.

Step 4. The MS awaits another overhead parameter message, and stores the other overhead message parameters and indicators (12.3.2).

The MS is now initialized and in the "idle" state. It remains tuned to the strongest paging channel. While in this state it keeps monitoring the overhead messages, and updates its memory when an overhead parameter changes. The idle state changes when the MS user originates, and when the MS receives a paging message, indicating a terminating call.

If the initialization procedure fails, the MS tries to contact the other system (the "B" system if the mobile homes on an "A" system, and vice versa).

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