The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1998
Filed:
Jun. 25, 1996
Applicant:
Inventors:
Michael D Hoy, Ipswich, GB;
Stephen J Curtis, Felixstowe, GB;
Assignee:
British Telecommunications public limited company, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ; H04M / ;
U.S. Cl.
CPC ...
379 29 ; 379 26 ; 379 21 ; 379-5 ;
Abstract
Testing of pre-ringing signalling in a telecommunications network at customer's premises, for example, signalling to activate a caller display unit may be effected remotely. By establishing a test call through the network by way of a dial-back loop to a test telephone number, establishing a second call through the network to the required telephone and simulating pre-termination conditions at network termination, actual signalling tones at the network edge are monitored by corresponding apparatus to that present at customer premises.