I am fairly new to all this so please forgive me if I come across as stupid! However, I have recently installed a SPA9000 with 8xSPA501g IP telephones.
Everything works great (internally) however when we place a call on hold and try to pick the call up again (by pressing the flashnig line button) the system drops the call/clears the line but the external caller is still on hold (hears internal hold music)
I have tried looking at audio codecs etc but nothing seems to help. The SPA9000 and all 8 SPA501g are sitting behind a Netgear (sorry!) WNR2000 router.
I have portforwarding enabled - 5060/5080, Still not helped.
Making and recieving calls works fine...We just can put people on hold as we lose them!!