We support several Epygi Quadro 2X2 systems.
We have just changed to a VOIP line ourselves and have noticed that the extension name seems to be passed through to our system when they call.
After investigation this appears to be from the 'SIP Display Info' field in the Message Header.
Is there a way to stop this from being sent so that it is only the external number instead?

From: "Sarah" <sip:ExternalNumber@sip.voip-unlimited.net>;tag=1406018258f714274f-0f8a-43e4-9b7b-e64c8e1ac1c9
SIP Display info: "Sarah"
SIP from address: sip:ExternalNumber@sip.voip-unlimited.net
SIP from address User Part: ExternalNumber
SIP from address Host Part: sip.voip-unlimited.net