150.86.0.39

  1. KMorley

    Yealink SIP-T58W phone firmware downgrade before upgrade for 3CX V20

    I just received a bunch of new Yealink SIP-T58W Pro phones for a new customer installation. When attempting to install these on a V20 hosted system, the phones received their configurations, but would not register with 3CX. The result was a "No Service" indication on the phones and the phones...
    • KMorley
    • Thread
    • 150.86.0.39 150.87.0.15 downgrade firmware sip-t58w upgrade yealink
    • Replies: 4
    • Forum: Yealink
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