looks like Apple found away around the iPhone trademark or something cause Apple has a LIVE trademark for the iPhone already.
http://tess2.uspto.gov/bin/showfield?f=doc&state=qke8ea.3.13It was trademarked on Sept 26th 2006 by Ocean Telecom Services LLC (a Apple company)
It seems like Cisco really dropped the ball on the Trademark.
Cisco's iPhone is refered to as a "computer hardware and software for providing integrated telephone communication with computerized global information networks."
while Apple's iPhone is refered to as "handheld and mobile digital electronic devices for the sending and receiving of telephone calls, faxes, electronic mail, and other digital data; MP3 and other digital format audio players; handheld computers, personal digital assistants, electronic organizers, electronic notepads; magnetic data carriers; telephones, mobile phones, computer gaming machines, videophones, cameras; prerecorded computer programs for personal information management, database management software, electronic mail and messaging software, paging software, database synchronization software, computer programs for accessing, browsing and searching online databases, computer software and firmware, namely operating system programs, data synchronization programs, and application development tool programs for personal and handheld computers; electronic handheld units for the wireless receipt and/or transmission of data that enable the user to keep track of or manage personal information; software for the redirection of messages, Internet e-mail, and/or other data to one or more electronic handheld devices from a data store on or associated with a personal computer or a server; and software for the synchronization of data between a remote station or device and a fixed or remote station or device; computer hardware and software for providing integrated telephone communication with computerized global information networks"
Simpley put, Cisco trademarked a piece of Computer Hardware while Apple trademarked a Cellphone Hybrid. Which in terms makes it two differnt products that are not compeating with each other for the same market.
The only bit Apple has to worry about in their trademark is "computer hardware and software for providing integrated telephone communication with computerized global information networks" Which means that they just have to worry about it being a VoIP phone.
Apple has smart lawers they know what they are doing.