Method and apparatus for polling telephony line status in an integrated services hub to reduce power consumption

摘要

The present invention discloses a method for reducing battery power consumed by an integrated services hub supporting a plurality of telephone lines. The status of power to the integrated services hub is monitored, and upon detecting a failure of primary power, each of the telephone lines is polled to detect an off-hook condition. The status of power to the integrated services hub is monitored while polling, and the polling is stopped upon detecting a return of primary power to the integrated services hub or upon detecting an off-hook condition in one of the telephone lines. Polling is performed by placing one of the telephone lines in a standby state and the remaining telephone lines in a disabled state and monitoring the telephone line in standby state for a predetermined amount of time to detect an off-hook condition. After the predetermined amount of time has lapsed, the monitored telephone line is changed from standby state to disabled state, and the next of the plurality of telephone lines is placed in a standby state, while any remaining telephone lines remain a disabled state. This polling sequence is repeated during active polling.