CA1307600C - Carte telephonique numerique pour systeme d'operateur
- Google Patents
Carte telephonique numerique pour systeme d'operateur
Info
Publication number
CA1307600C
CA1307600CCA000599366ACA599366ACA1307600CCA 1307600 CCA1307600 CCA 1307600CCA 000599366 ACA000599366 ACA 000599366ACA 599366 ACA599366 ACA 599366ACA 1307600 CCA1307600 CCA 1307600C
Authority
CA
Canada
Prior art keywords
operator
digital
level
receive
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nortel Networks Ltd
Original Assignee
Northern Telecom Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northern Telecom LtdfiledCriticalNorthern Telecom Ltd
Priority to CA000599366ApriorityCriticalpatent/CA1307600C/fr
Application grantedgrantedCritical
Publication of CA1307600CpublicationCriticalpatent/CA1307600C/fr
Method and apparatus for performing either tone analysis on a local looped-back communications path or utilizing a hybrid reflection based looped-back test to test integrity