H - Electricity – 04 – M
Patent
H - Electricity
04
M
H04M 3/22 (2006.01) H04M 3/42 (2006.01) H04M 9/00 (2006.01) H04M 7/00 (2006.01)
Patent
CA 2274205
The invention provides a key system unit comprising a first interface suitable for connection to a plurality of local terminals and a control unit coupled to the first interface. The control unit is operative for receiving a user data signal from the first interface and routing the user data signal toward a selected destination. The control unit has a registry for storing status information, the status information including a local segment and at least one remote segment, the local segment providing a representation of the functional status of the key system unit, the remote segment providing a representation of the functional status of a remote key system unit. The key system unit also comprises a second interface coupled to the control unit for allowing the control unit to exchange signaling information with an external entity, the signaling information conveying status information.
Dowser Michael T.
Egan Brian
Macaulay Robert P.
Meijer Frank F.
Solar Christopher R.
Nortel Networks Corporation
Nortel Networks Limited
Smart & Biggar
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