SPA504G Line not registering

[nb_cisco1]

Hi, we have two lines that are on our system at work and have both Cisco Spa504g phones. Both are not registering online.

Have tried everything from system reboots, factory resets, logging into both phones with different username/passwords and so on, but no luck at all.

Is there anything that I haven't tried that might be worth trying?

Nathan                   

[Dan Lukes]

Turn on and catch syslog and debug messages.

Debug and syslog Messages from the SPA3xx, SPA5xxG, SPA9xx, & WIP310 IP Phones

Using the slogsrv.exe Utility

Catch SIP dialog between the phone and your's telco.

Installing and Using Wireshark for Capturing Network Traffic

It should give you a hint what's wrong. If not, ask.