My IP phone DT700 connected to SV8300 system, when i was talking to some one by using DT700. i recived SMS on my Iphone6 placed near to DT700.Same time call droped. then i tested several time and find it was correct every time SMS tone play from my mobile, line get droped.Any one face this kind of issue before ? Any way to solve this issue.
I would try a different phone in place to see if it does the same thing.
I remember back in the 1990s phones running pure GSM mode would cause problems to Nortel M1 sets where as CDMA were OK. UMTS doesn't appear to cause problems. What mode is your iPhone running in??
By that I assume you're running 2G service and not 3G?? I know that the GSM 2G cellular paging (clickty... clickty sound) for the phone when a call is received or cell site has changed has in the past caused issues in the past though I wouldn't have though that there would be many phones running pure GSM these days..