Signaling arrangement

Details Signaling arrangement Signaling arrangement

1987-04-06

1988-04-05

Schreyer, Stafford D.

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of centralized switching system

379 18, 375 10, H04B 346, H04B 1700

Patent

active

047364025

ABSTRACT:
An interface unit connected to one end of a communication path is arranged to conduct a transmission test of the path before exchanging information with an interface unit connected to the other end of the path and to signal the results of the test by terminating the test when the results show an absence of transmission errors and continuing the test when the results show the presence of such errors, the test being the transmission and reception of a predefined sequence of signals.

REFERENCES:
patent: 4064459 (1977-12-01), Markwitz et al.
patent: 4095045 (1978-06-01), Johnson et al.
patent: 4255625 (1981-03-01), Walton et al.
Warren R. Moe, Leslie E. Morton, and Gerd W. Printz, "Accunet.TM. Switched 56 Is Providing Switched Digital Transmission Now," Record, Sep. 1985, pp. 26-30.
W. Douglas Hutcheson and T. M. Snyder, "Design and Deployment of Control Services Based on Digital Cross-Connect Systems," 1985 IEEE, pp. 562-566.
Digital Data System Data Service Unit Interface Specification, Bell System Technical Reference, PUB 41450, 326-186, Nov. 1981.
Special Access Connections to the AT&T Communications Network for New Service Applications, AT&T Technical Reference, PUB 41458, 326-204, Oct. 1985.

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