Telephonic communications – Diagnostic testing – malfunction indication – or electrical... – Of trunk or long line
Patent
1992-05-04
1994-10-04
Chin, Stephen
Telephonic communications
Diagnostic testing, malfunction indication, or electrical...
Of trunk or long line
379 24, 379 25, 379 26, 379 27, 379 29, H04M 124
Patent
active
053533275
ABSTRACT:
An "intelligent" maintenance termination unit (MTU) that can be installed at or near the demarcation point between the telecommunications network and Customer Premises Equipment (CPE), includes a program controlled processor arranged to perform numerous testing and evaluation functions on (1) the CPE and the drop portion of the telecommunications circuit located on the customer side of the MTU, as well as (2) the line portion of the telecommunications circuit on the network side of the MTU. Testing may be initiated in response to actuation of a pushbutton switch or other initiation means by the customer. Specific tests are then performed in response to receipt of signal sequences (such as Touch-Tone signals) received from a technician at a remote test center. The MTU advantageously includes audio input (microphone) and output (speaker) units, preferably in the form of a speakerphone set, enabling the technician to be placed in direct audio communication, in real time, with the customer when the MTU is actuated. The MTU is transparent to normal line operation, i.e., ringing, dialing and routine maintenance otherwise performed from the central office or by the CPE.
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Bellcore Technical Reference TR-TSY-000324, Issue 1, Dec. 1988, "Maintenance Termination Unit: Generic Requirements for Application on Single-Party Loop-Start Lines".
Adari Seva nanda
Chiang Marilyn C.
DeSanto Anthony M.
Fenley, Jr. R. Earl
Javvaji Anand K.
AT&T Bell Laboratories
Chin Stephen
Freedman Barry H.
Loomis Paul
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