05-26-2011 01:04 PM - edited 03-21-2019 04:09 AM
Will the Plantronics S11
and Plantronics CS55 work on the SPA504 and SPA508 phones?
05-26-2011 02:27 PM
02-13-2012 01:15 PM
Or you could use these headsets from Acoustical innovations.
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