I am having an issue with the integration of a siemens telephone switch with our Avaya S8710. The issue we are having, is that a group of people, behind the siemens system, is only able to dial our 7 digit extensions using a FAC that allows them to dial out of the siemens system. This is a shared FAC that allows everyone else in the facility to dial off the facility. I am trying to figure out how to tell the S8710 to accept 4 digit extensions (or even 7 digit extensions at this point) so that the users only have to dial the facility's extension, without having to dial from outside their realm. Right now they have to dial 9 digits instead of the 4 digits they want. they are a controller type of area and are requesting this be done. is there anything that im missing in the switch to make this happen? i've looked into the ARS ANA table, the uniform dial plan, the private numbering. Basically any option that i could think of. Please help.