Abstract: Disclosed is a printed circuit board configured for a dome-utilizing keypad configuration including at least one padstack having a plurality of dome switch targets and a plurality of target rings capable of accommodating different key dome locations of a dome keypad. Also disclosed is a padstack capable of accommodating different key dome locations. The disclosed padstack has a single dome switch targets input/output line for the plurality of dome switch targets of the padstack. The padstack also includes a single target rings input/output line for the plurality of target rings of the pad stack. In this way the disclosed printed circuit board includes a single circuit arrangement available for a plurality of different key pad designs.

Abstract: Disclosed is a printed circuit board configured for a dome-utilizing keypad configuration including at least one padstack having a plurality of dome switch targets and a plurality of target rings capable of accommodating different key dome locations of a dome keypad. Also disclosed is a padstack capable of accommodating different key dome locations. The disclosed padstack has a single dome switch targets input/output line for the plurality of dome switch targets of the padstack. The padstack also includes a single target rings input/output line for the plurality of target rings of the pad stack. In this way the disclosed printed circuit board includes a single circuit arrangement available for a plurality of different key pad designs.

Abstract: A communication device (203) can include a external data port (110) for at least data transfer and audio transmission and a switchable radio frequency protection circuit (205, 300, 400 or 500) that switches in a resonant circuit or filter circuit (312, 322, 412, 422, 512, or 522) upon detection of an audio transmission and switches out the resonant circuit or filter circuit upon detection of data transfer over the external data port. The switchable protection circuit include a computer processing unit controlled switching device (316) or a hardware identifier controlled switching device (314) or both. The communication device can further include data plus (+) and data minus (?) lines for audio receive and audio transmit. The communication device can also be a laptop for example. The external data port can be a multiplexed port supporting at least data transfer and audio and optionally battery charging.