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 [MMC 737] DECT System Code
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 Used to identify your DECT system and
 the handsets you register with your
 system. 
  ** Composed with
   System I.D   : 000 - 999
   Auth Code    : 0000- 9999, ffff

  ** Related Items
   MMC 738 Clear Registeration
   MMC 739 BSI Download
   MMC 741 BSI Restart
   MMC 742 BSI Status
   MMC 743 DBS Status
   MMC 744 BSI Registration ON/OFF
   MMC 745 BSI RF Carrier