DESC: Cortelco's industry standard telephones offer the reliability and economical value that customers have come to equate with the company's products. The Cortelco 2500 series telephones meet the basic needs of homes or small businesses.These sets are fully modular for easy installation and modification, are UL listed, hearing aid compatible and are equipped with a ringer volume control. The 2500 series telephones are available with additional features such as flash, message waiting, and A-lead control, making these phones complimentary to the hospitality industry, and compatible with CENTREX/PBX/1A2 applications.