Go to the estate office and you will be asked to complete a form with your details including the telephone number. The entryphone system outside simply calls a landline number programmed in beforehand. The form will be sent to the company that maintains the system and they will connect your number to the entrance panel. This may take up to 24 hours, or longer if you apply at the weekend. We have to charge for the administration of this service, and it is currently £25 per entrance.