This number called the office this morning, but it hung up after several seconds of silence.

I suspect it might be an entity alleged to be ITI by another poster as the caller id matches that of a company that has called us with two different numbers last year. Here are those numbers:

http://800notes.com/Phone.aspx/1-561-665-8508 and http://800notes.com/Phone.aspx/1-561-665-8511

Picked up and nobody was there.  I regret answering already.

Called me about updating my  digital ATT service.  Asked why they were calling me from Florida when I am 1500 miles away. Told them I just had ATT update my service 6 months ago and he abruptly hung up

Has been incessantly calling daily for past 8 days. Today, called twice. No message ever left. Number now blocked.
We legislation to put all telemarketers completely out of business!

“Hi my name is Pat, calling on behalf of AT&T, was trying to reach you about a notification we sent you, and didn’t hear from you, to do an update on your lines, call me at 561-277-0794, I’m in the office from 9:30-5:30am, Eastern time, and they will send you right to me.”

No way in h.e.l.l is she doing any updates to my lines! Talk about nefarious, and unscrupulous, posing as "on behalf of AT&T", some local bozo comes in, does some things, and next thing you’ve been slammed to some other entity. I guess calling morning-and-noon, and now even night is the new mode of operation.

They are the scammers:  http://www.itinetworks.com/contact.php
Remember any a-hole can have a website that looks serious.

Better yet, Pat's phone number of 561-277-0794, is in the most scummy, nefarious Hodges-Directory:
http://hodges-directory.us/directory.php?q=7m17-561-277-6577-Jupiter-Florida-Baytree-Ln
These folks are total ilk. DO NOT FALL VICTIM. IF YOU'VE BEEN "SLAMMED" meaning hijacked, contact your carrier immediately. We've seen scam artists like this before. Do not get taken!!!