公开(公告)号：EP0852094A1

公开(公告)日：1998-07-08

申请号：EP96929996.0

申请日：1996-09-19

申请人： NORTHERN TELECOM LIMITED

发明人： KOS, Steven ,  TURNBULL, Robert, B. ,  BLEILE, Leonard, George

IPC分类号： H04M3 ,  H04M1 ,  H04M9 ,  H04Q3

CPC分类号： H04M1/723 ,  H04M1/57 ,  H04M3/428 ,  H04M9/02

摘要： When two or more telephone sets are in use on the same subscriber's loop, their activities may not be properly detected or monitored by the central office switch. The present invention provides a method of, and an apparatus for, coordinating the signaling activities so that a hook flash or 'Link' can work. A telephone set of the invention senses and synchronizes hook flashes of another set on the same loop so that a coordinated hook flash or 'LINK' can be properly detected by the office switch.

公开(公告)号：EP0920768A1

公开(公告)日：1999-06-09

申请号：EP98910538.0

申请日：1998-03-12

申请人： NORTHERN TELECOM LIMITED

发明人： McKINNEY, Brian, Clifford ,  KOS, Steven

IPC分类号： H04M1

CPC分类号： H04M1/573 ,  H04M1/82

摘要： An apparatus for detecting customer premise equipment alerting signals (CAS) in a first telephone having a transmit circuit and a receive circuit and a hybrid line termination for connecting the transmit circuit and the receive circuit to a central office line. The apparatus includes an off-hook detector for producing an off-hook signal identifying whether or not the first telephone is in an off-hook state, an extension-in-use detector for producing an extension-in-use signal identifying whether or not a second telephone connected to the central office line is in an off-hook state, a CAS detector selectively operable to receive the CAS signals directly from the central office line and from the hybrid line termination and a control element for controlling the CAS detector in response to the off-hook signal and the extension-in-use signal. The control element acts to enable the CAS detector to monitor the CAS signals on the central office line directly when the second telephone is in the off-hook state and enable the CAS detector to monitor the CAS signals from the hybrid line termination when the first telephone is in an on-hook state, and the second telephone is in an off-hook state.

公开(公告)号：EP0852093A1

公开(公告)日：1998-07-08

申请号：EP96929995.0

申请日：1996-09-19

申请人： NORTHERN TELECOM LIMITED

发明人： BLEILE, Leonard, George ,  BECKER, Christopher, Henry ,  KOS, Steven

IPC分类号： H04M3 ,  H04M1 ,  H04M9 ,  H04M11 ,  H04Q3

CPC分类号： H04M1/723 ,  H04M1/573 ,  H04M3/428 ,  H04M9/02

摘要： When two or more telephone sets are in use on the same subscriber's loop, their activities may not be properly detected or monitored by the central office switch. The present invention provides a method of and an apparatus for coordinating activities so that call waiting caller ID or off-hook caller ID or other service features can work even if there are off-hook extensions on the same loop. The invention ensures that only one set among a plurality of off-hook sets responds to the switch.