IPC Definitions - January 01, 2012
H04B 17/00 - Definition
This main group covers:
Methods and apparatus for determining the manner in which a transmission system is functioning or the existence, type and location of any trouble.
References relevant to classification in this main group
This main group does not cover:
Monitoring, testing line transmission systems | H04B 3/46 |
Equipment for monitoring, testing transmission systems employing electromagnetic waves other than radio waves, e.g. light, infra-red | H04B 10/08 |