| 7187860 |
Method and apparatus for detecting localized polarization dependent anomalies on optical transmission lines |
Neal S. Bergano, William W. Patterson, III, Richard L. Maybach |
2007-03-06 |
| 6414405 |
Method and apparatus for operating cabled-fiber undersea network, and fault-tolerant branching unit for use therein |
Joel Schesser, Francis C. Bekampis, Robert Lynch, David Gunderson |
2002-07-02 |
| 6366381 |
Remote monitoring of an optical transmission system using line monitoring signals |
— |
2002-04-02 |
| 6211985 |
Remote monitoring of an optical transmission system using line monitoring signals |
— |
2001-04-03 |
| 6025949 |
Line monitoring of an optical transmission system using pilot signals |
— |
2000-02-15 |
| 5825515 |
Supervisory apparatus for optical transmission system |
— |
1998-10-20 |
| 5343320 |
Pump laser control circuit for an optical transmission system |
— |
1994-08-30 |
| 4633464 |
Control signalling arrangement for a digital transmission system |
— |
1986-12-30 |
| 4586186 |
Maintenance response signalling arrangement for a digital transmission system |
— |
1986-04-29 |