Exchange components (CODEC)	Exchange data interface cards	Exchange datacom modules	Phone exchange interfaces or components	Exchange trunk interface or card components
Premise branch exchange (PBX) systems	Telephone switching equipment	Switchboard equipment	Punch down blocks	Analog or digital telephones
Analog or digital cellular telephones	Mobile phones	Cordless telephones	Pay telephones	Answering machines
Telephone headsets	Voice mail systems	Call management system	Cellular telephone accessories	Telephone rests
Mobile phone jammer	Radiation shield	Video door phones