A few things do not sound right. First, we almost never use extension numbers that begin with 9. 9 is used to dial out. Second, MatWorX is used on the NEAX 2000/IVS2/IPS system and not on the 2400. As far as call coverage goes, just place extension 9755 on a button on every phone that needs to answer it. Or, create a virtual extension and place that on a button on every phone that need to answer it.