Polycom SOUNDPOINT IP 501 SIP "phone ringing somebody calls" Questions

ringing tone & volume, changed handset batteries.... not successful... anyone has a tip? I have exectly the same problem.After surfing the internet i found out that many people experience such bug

phone". Name that one "Y". can somebody help me in my magic jack i cant make any call at all neither local nor long distance and my magicjack is saying ready to call either plz send me the solution on

...phone and several other brands,but no cisco phones. So,the calls cannot be routed to the sip trunk. can somebody help me we have a Sip connection between a mitel 3300 and Cisco callmanager only the ...

...one phone rings instead of ringing in all phones and we cannot transfer calls between extensions R U USING XLITE OR ARE YOU USING ANY ASTRISK SEREVER... IT IS VERY EASY JUST GIVE ME THE