IES20080138A2
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A switching system
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IES20060109A2
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A voice over internet protocol phone
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IES20030046A2
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ISDN terminal adapter
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IES20020878A2
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Voice and data switch
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IES20020759A2
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Voice and data exchange
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IES20000115A2
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A communications device
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IES980233A2
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A terminal adapter for PABX telephone system
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IES80945B2
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Improved modular private automatic branch exchange (pabx) telephone system
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IE970510A1
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Coin-operated telephone
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IES77651B2
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Coin-operated telephone
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IES940369A2
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A private automatic branch exchange (PABX) telephone system having improved exchange line and extension line interfaces
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IES940129A2
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Modular private automatic branch exchange (pabx) telephone system
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IE930001A1
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Improvements in and relating to a private automatic branch exchange (PABX) telephone system
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IES57716B2
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Improvements in and relating to a private automatic branch exchange (pabx) telephone system
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IE892970A1
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Improvements in or relating to a private automatic branch exchange (pabx) telephone system
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IE862640L
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Monitoring apparatus
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