SmartVox makes use of standard, Cisco VoIP telephones. Generally, these are SPA-3XX, and SPA-5XX series phones. You can tell which yours is by looking at the top right of the phone. PDF Manuals for each phone model are available directly from Cisco’s web site at the following links.
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*Note: Cisco has discontinued the generic SPA5XX user guide. This link will take you to Cisco multimedia presentation on the features of the phone.