We have test tools that require us to call SIP addresses like
I used to use SJPhone on Windows XP, and an older version of X-lite, which both worked fine, and didn't require the SIP phone to be registered with a SIP proxy.
I have just upgraded to Windows 7 and SJPhone doesn't seem to work any more (see forum here for others with the problem) - it says "No sound input device / No sound output device" at startup.
I have tried a range of other softphones (X-lite 3, X-lite 4, Zoiper, 3CX), but I can't seem to find any that will install on Windows 7 and will let me call a SIP address like
localhost:5061. It might be that I just don't know how to configure these phones to do it...
Update: I didn't make any changes but SJPhone started working recently on my Windows 7 machine. I had definitely tried rebooting before, so I don't think that was the reason.