You would have to write your own logic to validate that. In doing so, you might need to create a new field (or even 3 fields to divide the telephone number) to replace the existing field. It would be possible with modification in SRM releases lower than 7.0 and with configuration and enhancement for SRM 7.0.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.