[time-nuts] Time in Phone System

[Mike S]

On 7/21/2014 11:07 PM, Brooke Clarke wrote:

> Every phone in my house that has an LCD shows the correct date & time,
> but I have never set any of them.
> I expect that there's date and time information being sent in the header
> of every phone call, maybe even before the first ring along with the
> Caller ID info

CID is sent using FSK between the first and second rings, and includes 
the networks idea of TOD. Google can provide details.