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US5255315A
(en)
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Method of rerouting telecommunications traffic
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JPH07154511A
(ja)
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情報サービスシステムとその使用方法
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US6628769B1
(en)
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Intelligent network
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CZ104497A3
(en)
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Switched network and a telecommunication system containing such switched network
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US4782508A
(en)
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Method of discouraging the completion of wrong-number calls
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CA2146186A1
(en)
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Enhanced efficient telephone number portability
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US6289088B1
(en)
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Pay phone call completion method and apparatus
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BE374732A
(instruction)
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WO2002003171A2
(en)
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Method and system for providing caller identification for an unidentified calling party
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US5652753A
(en)
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Digital telephone
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GB208509A
(en)
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|
Improvements in or relating to telephone systems
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US6256380B1
(en)
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Methods for processing operator service system calls
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CA2200631C
(en)
|
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Security station receiver
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US2087398A
(en)
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|
Automatic switch for use in telephone or like systems
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BE373049A
(instruction)
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|
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EP1493166B1
(en)
|
|
Relay and cross-connect
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BE374766A
(instruction)
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BE501256A
(instruction)
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JPS6367096A
(ja)
|
|
構内電話交換機
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BE531767A
(instruction)
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|
|
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CH293577A
(fr)
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Installation de télécommunication.
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KR100247677B1
(ko)
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2-라인 및 키시스템 동작모드간을 선택하기 위한 전화 장치의 스위칭 회로
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BE469508A
(instruction)
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JPS6132695A
(ja)
|
|
分散形電子交換機のル−ト選択方式
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BE464330A
(instruction)
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