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.

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