Lamp power supply arrangement for key telephone system

Language accommodated message relaying for hearing impaired...

Language interpretation call transferring in a...

Large capacity coin receptacle for pay telephones

Latching relay drive circuit for use in telephone sets

Latching relay hold circuit for a telephone instrument

Latching relay hold release circuit for a telephone instrument

Latency counter for scanning timers

Layered channel element in a base station modem for a cdma...

Leashed portable personal digital appliance

Least cost routing device for separate connection into...

Lifeline telephony provision for voice over digital...

Light controlled telephone ringer

Lighted display for a console

Lighted telephone

Lighted telephone dial

Lighted telephone dial

Limiting amplifier for common mode feedback in telephone...

Limiting use of unauthorized digital content in a...

Line access control apparatus and line access system