Laser communication system
Laser wavelength stabilization
Level control of digital signals
Level-flattening circuit for wdm optical signals
Line concentrating telephone system
Line concentration system
Line concentrator for dealing with asynchronous and...
Line equipment for synchronized pcm digital switching system
Line monitoring for sdh signals
Line switching and control system
Line switching systems
Line variation compensation system for synchronized pcm...
Local oscillating frequency synthesizer for use in a tdma...
Logical machine for processing control information of...
Long-distance mutualized transmission method using optical...
Loop network hub using loop initialization insertion
Loop network system controlled by a simple clock station
Loop-back in dual ring network
Loopback of a pcm signal with loopback command signal bits...
Low cross correlation palindromic synchronization sequences