Show VDN name instead of station name on internal calon internal calls

[Robi544]

I have an Emergency phone (several actually) on an analog station port (2500 set, think elevator type phone). The phone has no dialpad, only two speed dial buttons. One for EMER, one for INFO.

I want the EMER calls to go to Security (x4051), and the INFO calls to go to Guest Services (x4000). Easy enough, I've just programmed the phone to dial the internal extensions accordingly.

Problem is, I want the calls to display differently on the destination phone.

Calls to Security should show "EMER [Location_Name]" at the phone on the security desk.
Calls to Guest Services should show "INFO [Location_Name]" at the Guest Services phone.

I've tried to accomplish this by sending the EMER calls to a VDN with the name "EMER [location_Name]" and vector with a route-to x4051. Likewise similarly for the INFO calls. The call routes correctly but, sadly, never shows the VDN name. The station name/extension always passses.

Is there any way to ensure VDN name overrides the internal station name on the destination display? Is there an alternate way to do this? I've avoided coverage since we don't want cover tone or delay when routing the call.

I've tried:
1) VDN overide - no help
2) Mask CPN Name for internal calls on COR - no help, it masks all name info