Supported Cisco Wired VoIP Phones
The Cisco PA100-NA is a 5V, 2A, center positive power adapter. This power adapter can be used with all Cisco 500 Series, 300 Series, 100 Series as well as many other models of Yealink phones.
General Telephone System Support Articles
Information on the Message Center / Voicemail system and options.
Information on published system feature codes.
Internet Information, Access and Support