Loopback cell control system

Loopback mechanism for frame relay OAM

Loopback mechanism for frame relay OAM

Loopback processing method and apparatus

Method and apparatus for analyzing events in a...

Method and apparatus for analyzing events in a...

Method and apparatus for compensating for optical...

Method and apparatus for compensating for optical...

Method and apparatus for link state determination in voice...

Method and apparatus for measuring network performance and...

Method and apparatus for temporal alignment of multiple...

Method and apparatus to test a data path in a network

Method and communication arrangement for testing subscriber...

Method and system for looping back traffic in QIQ ethernet...

Method and system for PHY loop detection

Method and system for testing data channel functionality in...

Method for automatically setting transfer mode in line...

Method for automatically setting transfer mode in line...

Method for identifying mis-optioned data communications...

Method for qualifying a loop for DSL service