Abstract: A method and a system for identifying and locating sheath-to-ground fault at any arbitrary locations in a cross-bonded, single point grounded at the beginning, single point grounded or at the end at the middle, and two point grounded power cable during online condition. The system comprises a circuit having a major section of high voltage cross-bonded cable having 3 phases R and three minor sections, which interconnected with SVLs in the link box to form three loops, three-phase source voltages, and loads of each phase. The metallic sheath of each phase is grounded at the grounding box through grounding resistances. A current measuring unit measures the sheath current from this grounding resistance. This measured current is analyzed to identify and localize the inception of SG fault in a CB cable.

Abstract: A smart mic may be combined with an LMR radio terminal for user communication. An outgoing user communication by either the LMR terminal or the smart mic causes a corresponding incoming communication received respectively at the smart mic or the LMR terminal to be suppressed in various ways. This prevents audio interference for the user.

Abstract: A combined cellular smart-mic and LMR radio terminal is operated to give preference to one wireless bearer over the other. A voice call is often received both on the cellular bearer and the LMR bearer. It is then determined if the cellular or LMR bearer is preferred for calls. The call continues on the preferred bearer only while the same call on the non-preferred bearer is discontinued. The non-preferred call can be muted, disabled or ended for example. The preferred bearer may be determined by signal quality, user location, network priority or user settings, for example.

Abstract: A combined cellular smart-mic and LMR radio terminal is operated to give preference to one wireless bearer over the other. A voice call is often received both on the cellular bearer and the LMR bearer. It is then determined if the cellular or LMR bearer is preferred for calls. The call continues on the preferred bearer only while the same call on the non-preferred bearer is discontinued. The non-preferred call can be muted, disabled or ended for example. The preferred bearer may be determined by signal quality, user location, network priority or user settings, for example.

Abstract: A smart mic may be combined with an LMR radio terminal for user communication. An outgoing user communication by either the LMR terminal or the smart mic causes a corresponding incoming communication received respectively at the smart mic or the LMR terminal to be suppressed in various ways. This prevents audio interference for the user.