Model IBM-4900 Click the buttons to check the current price, stock level and freight cost. You can have up to 12 separate cordless phones using up to 4 lines, or you can also add the IBM corded phones, models IBM 412 CID with caller ID or the IBM basic 412 model to your system. There are no base boxes to install, the IBM phones communicate with each other over normal phone lines. Just plug them in wherever you have an extension jack. This IBM cordless phone makes and receives calls within a range determined by the maximum power allowed by FCC rules.
Range depends on local reception conditions such as physical and atmospheric conditions.
Actual talk time allowed by the battery depends on the distance between the handset and the base during actual usage. 3.5 sec dial pause. 20 bit base to handset security. Digital encryption assures privacy. Spare battery backup port.