Recently start experiencing following issue: unable receive incoming calls on my fongo home phone. Keep getting busy signal right after 2nd ring on incoming calls. Outgoing calls work perfect.
Opened service ticket, but that didnt help much (person from support upgraded firmware on Grandstream HT701 and made some changes in settings through remote access). Still about 70% off all incoming calls get busy signal on 2nd ring (unless Im picking up after 1st ring - works fine then), therefore they are not going to my answering machine (set for 4 rings), neither to fongo voicemail (set for 8 rings).
Problem started just recently, before - no major problem for couple years
Pls, HELP!!!