Yealink SIP-T48U Guia De Inicio Rapido página 14

Technical Support
Visit Yealink WIKI (http://support.yealink.com/) for the latest firmware, guides, FAQ, Product documents, and more. For better service,
we sincerely recommend you to use Yealink Ticketing system (https://ticket.yealink.com) to submit all your technical issues.
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