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If you have no backup, there is no way of knowing what has been done by the criminal(s).<br>Best would be to wipe the device and setup from a trustable backup or from memory.<br>And change the password on the go.<br><br>Here is the manual:&nbsp;<br><a href="https://www.manualslib.com/manual/1005241/Panasonic-Kx-Tva50.html?page=13#manual" rel="ugc">https://www.manualslib.com/manual/1005241/Panasonic-Kx-Tva50.html?page=13#manual</a>
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<p>Not sure if anyone can help but I am an IT guy and a customer needs his Panasonic telephone system default password changed.</p><p>It's been hacked and the provider has shut him down.</p><p>It is a TVA-50 system.</p>
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Not sure if anyone can help but I am an IT guy and a customer needs his Panasonic telephone system default password changed.
It's been hacked and the provider has shut him down.
It is a TVA-50 system.

Panasonic PBX  help?

Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service. The term specifically refers to the provisioning of communications services (voice, fax, SMS, voice-messaging) over the public Internet, rather than via the public switched telephone network (PSTN).  Examples of the VoIP protocols are H.323, Media Gateway Control Protocol (MGCP), Session Initiation Protocol (SIP), H.248 (also known as Media Gateway Control (Megaco)), Real-time Transport Protocol (RTP), Real-time Transport Control Protocol (RTCP), Secure Real-time Transport Protocol (SRTP), Session Description Protocol (SDP), and Inter-Asterisk eXchange (IAX).