Show Extension number

Hello, I've yaestar S20 with 3 SIP accounts and 1 Extension. as we give a service for 3 products we need to know for which number the client are calling. for That I would like show on the phone screen the number or name which the client are calling and not the number from the client. is it possible? example: Client call to 00123456 and on the phone it shows calling 00123456


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