VoIP hardware

MagicJack, stylized as magicJack, is a service that allows people in the United States and Canada to make phone calls over the Internet. This type of phone service is called Internet-based telephone service (VoIP).

Ooma, Inc. is an American publicly traded telecommunications company based in the Silicon Valley, California area. Ooma offers communications services including Voice over IP (VoIP) calling for business, home and mobile users.

Zultys, Inc. is a privately owned software company headquartered in Sunnyvale, California. It develops unified communications products and integrated desktop IP phones. Zultys' business phone systems and contact center telephony services can be installed and operated as premises-based technology and as cloud-based software as a service.

The Linksys iPhone was a line of internet appliances from Cisco Systems. The first iPhone model—released by Infogear in 1998—combined the features of a regular phone and a web terminal. The company was later purchased by Cisco and no new products were marketed under the name between 2001 and 2006. At the end of 2006, Cisco rebranded its Linksys VoIP-based phones under the name, shortly before Apple released an iPhone of its own. This led to a trademark dispute between the two companies, which was resolved on February 20, 2007.

Obihai Technology was a company that manufactures analog telephone adapters that supported Session Initiation Protocol (SIP), XMPP, and Google Voice compatible Internet telephony. Obihai was sold to Polycom in 2018, with Poly and Plantronics sold to HP in 2022. Most items in the former Obihai product line have been either rebranded as Poly or discontinued.