I've got three issues with a KX-TEA308 One : The Phone exchange either doesn't recognize /or transfer incoming calls out to its extensions until the third ring. Second issue: The internal answering machine can't differenciate between a call hanging up or someone actually leaving a message.thus occupying precious space and leaving no more room for voice messages. 3 : How would I go about programing an external answering machine to the PBX and adding a cd player for the MOH and BGM ?I looked @ the manual online ,but since I am relatively new at this game ,I'd love if someone with expertise in the field can help me out .Later Dave