4. Telephonic communications
  5. Plural exchange network or interconnection
  6. Interexchange signalling

Martti Yrjana

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Procedure and system for ensuring emergency communication

Telephonic communications – Emergency or alarm communications
Reexamination Certificate

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Procedure and system for ensuring emergency communication

Telephonic communications – Plural exchange network or interconnection – Interexchange signalling
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Procedure for determining register recall filtering times in...

Multiplex communications – Pathfinding or routing – Switching a message which includes an address header
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1744465

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