The Ameritec Model AM48 is a compact, user-friendly, yet powerful hand-held analog transmission test set. About the size of a personal organizer and weighing less than 2 lbs., it can easily be transported in a briefcase or slide into a tool kit. It is powered by four AA batteries, an accessory 110 VAC adapter/recharger or four AA rechargeable NiCad batteries. The unit is designed for field testing and measurement of voice and data for 2 or 4 wire telecommunications transmission circuits. This unit is a full function signal generator able to generate all of the test tones and waveforms needed to perform a variety of standard measurements. It is a telephone set with built-in dial, talk and listen capability with a selection of 600 ohm or 900 ohm termination impedance. This unit fully complies with Bell Standard 41009.