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Capcode Calculation

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LRS uses a combination of system ID and pager ID to identify pagers. The system ID is normally the same for every pager in the system. The pager ID identifies a particular pager, or address, within a system.

Since POCSAG uses a single address field (the capcode) to identify pagers and addresses, the LRS system ID and pager ID combination must be mapped to a capcode.

Given the following variables:

  • C - POCSAG capcode
  • Ps - LRS system ID
  • Pn - LRS pager ID

The capcode calculation is as follows:

System IDs 0 through 13C = 100000Ps + 8Pn + 700000
System IDs 14 through 200C = 100000 x ((Ps - 14)/9) + 10000((Ps − 14) mod 9)+ 8Pn + 10000

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