Hello, All:

I bought a so-called "atomic clock" two days ago, and it receives the
radio signals from NIST (National Institute of Standards and
Technology) to automatically adjust its time. And it works fine.

Meanwhile, I called the Verion telephone number [(757)622-9311 in
southern Virginia] which gives current time. To my surprise, I found
that the Verizon time is about four (4) seconds faster than the NIST
time.

What is the cause of this difference? Is it due to telephone
transmission delay? Or does Verizon use an independent clock that is
not synchronized with NIST?

Thanks for reading the replying.

Roland