Lets you adjust ringing volume or turn ringing off completely. You may also be able to choose from several ringing sounds or a vibrator alert, as in the EnGenius SN920 . Some cordless phones have ringing in the base as well as the handset. Allows you talk from base to handset. Intercom calls can usually be initiated from either piece.
Automatic intercom activates the other unit for hands-free response, or remote monitoring.
Some phones have displays on both the handset and base, some on just the base or just the handset. Some displays are illuminated to help you read them in dim light. Nickel-Metal Hydride batteries can offer up to three times the capacity of the same size standard Nickel Cadmium batteries. Due to their increased capacity and energy density features, users can expect longer talk time and longer standby time. Some phones can also be programmed to prevents outgoing long-distance calls or calls to individuals or groups of numbers you choose.