m able to solve this issue , see this thread for detail. Box was alive , did lots of research, conclusion: changing some odd setting brings box to unstable state, which hides IVR and factory rest. Update load default settings solves the issue. Look for attached file in given thread.
http://forum.voxilla.com/linksys-sip...tml#post110432 (SPA 3102 NO IVR)
Now i am setting up 3102 with PSTN (in lhr) , Please post your settings in detail, specially regional settings, would save me lots of hit n try.
Thanks