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Exchange system and method of connecting calls in said exchange

Telephonic communications – Special services – Call diversion
Patent

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Exchanging apparatus and control method for exchanging and conne

Telephonic communications – Special services – Repetitive call attempts
Patent

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Execution of services in intelligent network

Telephonic communications – Special services – Service profile
Reexamination Certificate

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Expandable multiline dialing apparatus

Telephonic communications – Special services – Reserved call
Reexamination Certificate

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Extended number portability database services

Telephonic communications – Special services – Service trigger
Reexamination Certificate

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Extended public switched telephone network architecture with enh

Telephonic communications – Special services – Anonymous party
Patent

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Extension device for a computer system capable of operating in a

Telephonic communications – Special services – Anonymous party
Patent

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Extension of centrex services

Telephonic communications – Special services – Service trigger
Patent

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External-to-internal numbering plan aliasing

Telephonic communications – Special services – Anonymous party
Patent

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