Holy cow, I wrote a book!
Shortly after my group got switched over to new
fancy-dancy IP phones,
one of my colleagues sent me email to say
"This morning, when I picked up the phone,
I kept getting a 'URL not allowed' error.
I fixed it by rebooting my phone."
So this is what the world has come to.
As many readers surmised, these "new" IP phones arrived
over a year ago.
On the other hand, I never did get to learn all the features
of the device before it was replaced with a different model
of IP phone.