Plantronics M170™ End of Life Announcement: Plantronics will be discontinuing the M170 (45631-51). Going forward, please transition customers to the M175C (45632-61) which is currently available. Last order date for M170 will be January 15, 2011 or while supplies last.
Plantronics Voyager® 520 End of Life Announcement: Plantronics will be discontinuing the Voyager 520 mobile Bluetooth headset (75859-01). Last order date will be December 15, 2010 and will be available while supplies last.
Source: Plantronics Dealer Newsletter