[otrs] Limiting a customer to low and normal priority ticket opening

Hi I'm looking for a way of limiting a customer to open tickets with a priority higher than normal. What I'm trying to do is that a customer can open tickets with priority "low" or "normal" using mail and web but forcing him to open a ticket by phone for "high" priority tickets. Is there a way in OTRS 2.0.2? -- Best regards Roberto Giana _____________________________________________________ Giana Roberto Consulting - GiaRoCo https://www.giaroco.ch/ _____________________________________________________