Enhanced acoustic calibration procedure for a voice switched...

Enhanced application telephone network

Enhanced call feature service

Enhanced call notification service

Enhanced call pickup

Enhanced call waiting

Enhanced caller id with recipient-selected caller...

Enhanced communication bridge

Enhanced dedicated teleconferencing system

Enhanced directory assistance service providing individual...

Enhanced directory assistance system

Enhanced efficient telephone number portability

Enhanced extension mobility

Enhanced feature access via keypad and display in a user...

Enhanced high voltage line interface circuit

Enhanced language support for legacy call control system

Enhanced line card and packetizing cpe for lifeline packet...

Enhanced line card and packetizing cpe for lifeline packet...

Enhanced modem for direct advertising information via an lcd...

Enhanced operator console