Fact. release notes that in version 7.5.5 fixes a bug with the encoding names in the address book in Russian, and update your phone to a version greater than 7.5.1a does not work.
Phone Cisco SPA502G (SN CCQ16330DRA, HW 1.0.4, MAC 649EF3794AB0, SW 7.5.1a) SW port is connected with the correct cable to the Ethernet port on my laptop. Two-way exchange of traffic.
After you click Upgrade in the utility spa50x-30x-7-5-5.exe the process of downloading the file spa50x-30x-7-5-5.bin to the device before the device swears by icmp and changes to the original state, and the utility after 1 , 5 mintuy reports an error.
Dump, shot with wireshark on the clip.
P.S.: A write later, because Your only saw when looking for information on another matter. On the e-mail notification of replies to the topic has been received! :-(
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