(edit to add snip from phone GUI)
Have been wrestling with remote S505 phones all day trying to get them to register. Just found by looking at the phone GUI that the SIP server name is
…the port is missing off the end. For all the S505 phones, but not the legacy SPA504 and 514 phones. When I add 5060 after the colon in the phone GUI, they register.
When I look at the XML file in /tftpboot for the phone, the SIP host is complete, but it’s not in the phone GUI. The line from the XML file (name changed to protect the innocent):
<P47>phones.aaaabbbbbxxxxxcc.com:5060</P47> (so 32 total characters)
Phones are set to be using firmware 1.61 in EPM firmware management. The handset I have here shows Firmware IMG 18.104.22.168 on the LCD in Info.