Why do you need my phone number for the intercom?

The Intratone intercom works through two-way audio communication via phone calls. We have pre-programmed the intercom with the main phone number(s) that we hold for you, up to a maximum of two numbers.  

If more than one phone number is programmed into the intercom, it is useful to decide who in the household is best to receive the first call, as the intercom will only ring the secondary number if the first call goes unanswered. 

Alternatively, if you have a landline, you can set the intercom to call your landline first and then call your mobile phone if you are not at home. It will do this automatically if you do not answer via the landline.