Patent ID: 8457292
Filing Date: 2013-06-04
Classification: H04M

Abstract:
1. A busy lamp field system for remote telephones, comprising: a plurality of switchboard systems, each switchboard system comprising: a private branch exchange (PBX) connected to the internet; and at least a telephone connected to the private branch exchange, the telephone housing having at least a busy lamp field (BLF) key set to associate with corresponding phone number of a remote telephone, wherein the remote telephone is a telephone of another switchboard system; an extensible markup language (XML) server connected to each switchboard system via the internet and having an up-to-time table used for storing phone status of each telephone in each switchboard system; wherein each telephone is connected, directly without being through the PBX, to the XML server via the internet and periodically uploads to and stores local phone status in the up-to-time table, and each telephone retrieves the phone status of the remote telephone corresponding to the BLF key from the up-to-time table and displays the phone status via the BLF key, and wherein a phone number corresponding to the remote telephone is set to associate with the BLF key of the telephone and when the BLF key is pressed and the remote telephone is on idle status, the telephone autodials to the remote telephone.