I have very limited knowledge of this codec despite having used one successfully for years (mostly incoming connections) I have just acquired a prima 110 which despite assurances was in full working order, will not frame incoming calls. Boots up normally. Brief displays of 'call received on line one...line two' on LCD display as usual detecting incoming calls, but apparently will not frame. As an aside..punching in the speed dial 27 (that previously I have selected to configure with Telos Zephyrs) and speed dial 1 that I have used to return to normal operation, are both greeted with the message 'SD ID NOT FOUND' on display. I have no idea specifically what tasks the codec has been used for previously. Any suggestions as to how to solve this would be appreciated. Is this a set-up issue? or a software problem? or a major hardware fault?