Cortelco 7 Series 2740 - corded phone with caller ID/call waiting
The 2740 is much more than just a telephone; it's a system within itself. Expandable to 16 telephones and up to 4 lines, the 2740 requires no complicated wiring or background equipment. Everything needed is built into the phone. The 2740 provides features and functionality that traditionally have been available only in more complicated and costly systems.