4. Telephonic communications
  5. Multi-line or key substation system with selective switching...

Todd Krein

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Apparatus and method for powering a network device

Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via frequency channels
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Failsafe configuration for alternative network telephony

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Failsafe configuration for alternative network telephony

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Providing multiple line functionality using alternative...

Telephonic communications – Multi-line or key substation system with selective switching...
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Selective processing of calls using alternative network...

Telephonic communications – Plural exchange network or interconnection – With interexchange network routing
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Profile ID: LFUS-PAI-P-2881186

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