Non-intrusive performance monitoring of a DS0 channel between a customer premises interface and a D4 channel bank includes an augmentation of existing channel bank equipment and a digital services communication device terminating the DS0 link at the customer site. An auxiliary signalling and performance...http://www.google.fr/patents/US5661778?utm_source=gb-gplus-shareBrevet US5661778 - Performance monitoring of DSO channel via D4 channel bank
Performance monitoring of DSO channel via D4 channel bank
