Access circuit diagnostics for integrated services digital network
AssigneeRacal Data Communications Inc.
InventorsJack E. Stephenson, Jay P. Jayapalan, Ming-Luh Kao, Charles R. Baugh, Jerry A. Miller
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Abstract
A method of providing B channel diagnostics to an integrated services digital network (ISDN) comprises the steps of monitoring error performance on the ISDN D channel and comparing the D channel error performance to a predetermined criterion as a measure of the B channel error performance. If the predetermined threshold is exceeded any of a number of possible actions can be taken by a network diagnostics controller including various loopback tests, alerts or network reconfiguration.
Claims23
A method of providing diagnostic information in an ISDN having a B channel and a D channel, comprising the steps of:
- monitoring error performance of said ISDN D channel;
- establishing a representation of said error performance in a format suitable for comparison with a predetermined error performance criterion;
- and
- comparing said ISDN D channel error performance with said predetermined error performance criterion as an indication of said ISDN B channel's error performance.
An apparatus for performing diagnostic operations on an ISDN including a B channel and a D channel, comprising in combination:
- interfacing means for interfacing to an ISDN access circuit;
- error logic means for monitoring error performance of the D channel of said ISDN access circuit;
- means for establishing a representation of said error performance in a format suitable for comparison with a predetermined error performance criterion;
- comparing means for comparing said error performance with said predetermined error criterion;
- and
- output means for producing an output signal in the event said error performance compares unfavorably with said predetermined error criterion.
An apparatus for performing diagnostic operations on an ISDN including a B channel and a D channel, comprising in combination:
- interfacing means for interfacing to an ISDN access circuit;
- error logic means, coupled to said interfacing means, for monitoring an error rate of the D channel of said ISDN access circuit by counting the number of errors occurring over a predetermined period of time;
- comparing means, coupled to said error logic means, for comparing said error rate with a predetermined maximum allowable error rate;
- and
- output means, responsive to said comparing means, for producing an output signal in the form of a MAYDAY for a network diagnostic controller coupled to said ISDN in the event said error rate exceeds said predetermined maximum allowable error rate.
Dependencies are inferred from the claim text.