07599623 is referenced by 4 patents and cites 3 patents.

An apparatus or corresponding method of managing Plain Old Telephone Service (POTS) lines in a Passive Optical Network (PON) to prevent an alarm system from generating an alarm during a software upgrade or maintenance of an Optical Network Terminal (ONT), Optical Line Terminal (OLT), or PON while maintaining the effectiveness of the alarm system. The ONT may store data related to a POTS line in nonvolatile memory. The ONT may activate the POTS line based on the data from the nonvolatile memory in an event of interruption in communications with an OLT prior to reestablishing communications with the OLT. The interruption in communications may be caused by an ONT reboot to complete an installation of a software upgrade. The ONT may energize the POTS line with a voltage in response to activating the POTS line to prevent the alarm system from generating the alarm.

Title
Apparatus and method of managing POTS lines in a PON network
Application Number
11/352942
Publication Number
7599623 (B2)
Application Date
February 10, 2006
Publication Date
October 6, 2009
Inventor
Marc R Bernard
Vienna
VA, US
Thomas E Conklin
Leesburg
VA, US
Raul F Fernandez
Miami
FL, US
Douglas A Atkinson
Ashburn
VA, US
John A Stock
Petaluma
CA, US
Agent
Hamilton Brook Smith & Reynolds P C
Assignee
Tellabs Petaluma
IL, US
IPC
H04J 14/00
View Original Source