The Panasonic KX-TDE100 Digital telephone systems modular design allows you to tailor the KX-TDE100 system to meet your specific requirements. The Panasonic KX-TDE100 telephone system combines versatile wired telephone system features with the expanded functionality of advanced multi-cell wireless technology to meet the needs of today’s upscale residential, SOHO and small business environments. The Panasonic KX-TDE100 telephone system can be configured with a maximum of 12CO’s and 48 extensions. The KX-TDE100 systems 48 extensions can be comprised of up to 24 Panasonic KX-T7600 series proprietary telephones and 24 Panasonic wireless handset extensions. The Panasonic KX-TDE100 telephone system also supports single line telephones (SLT) and 4 doorphones/openers. This Panasonic KX-TDE100 telephone system offers a modular design combined with PC programming making installation fast and simple.