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Flexible tributary unit protection method for a trunk-multiplexed metallic interface

  • US 6,529,599 B1
  • Filed: 07/07/1998
  • Issued: 03/04/2003
  • Est. Priority Date: 07/07/1998
  • Status: Expired due to Fees
First Claim
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1. A telephone or data communication system with metallic interfaces, comprising:

  • a bus;

    one or more metallic interface units each having (a) first input terminals for receiving a first set of tip/ring signals, (b) second input terminals for receiving a second set of tip/ring signals, (c) a processing circuit providing a metallic interface for said first set of tip/ring signals, (d) a switch circuit coupled to said first input and second input terminals for coupling said first set of tip/ring signals to said processing circuit and for coupling, upon receiving an asserted control signal, said second set of tip/ring signals to said bus; and

    a protection metallic interface unit coupled to receive from said bus a set of tip/ring signals, said protection metallic interface unit implementing a metallic interface for said set of tip/ring signals from said bus;

    wherein said metallic interface units support various classes of services, each metallic interface unit being adapted to support one of said classes of services, said telephone system further comprising additional protection units each one of which is capable of supporting two or more of said classes of services.

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