I am unaware of that feature. What I do know, is that if you have a v92
protocol modem, which most newer systems do, and your ISP supports it, you
can receive and make phone calls while online (the data online connection
is suspended when you make or receive a phone call, and resumed when you
finish your phone call. v92 modems are backward compatible to v90 if your
ISP doesn't support v92 (but then you don't get the options that v92 allows.
v92 is also faster than v90 modems. Again, your ISP MUST support v92 for
you to be able to take advantage of the features.
What is V.92?
V.92 is the new dial-up modem specification from the ITU (International
Telecommunications Union) that introduces three new features that will add
convenience and performance for the modem user. The three features are Quick
Connect, Modem-On-HoldT, and PCM Upstream.
Overview of V.92 features:
Quick Connect will shorten the time it takes to make a connection by
remembering ("training") the phone line characteristics and storing them for
later usage. Under optimal conditions, Quick Connect may decrease modem
handshaking (the noise you hear when you connect) time by up to 50% over
conventional V.90 modems.
Modem-On-HoldT allows you to receive an incoming call on the same line that
is accessing the Internet and stay connected to the Internet. Call-Waiting
service from your phone company is required.
PCM Upstream/V.44 Compression* - PCM Upstream boosts the upstream data rates
between the user and ISP to reduce upload times for large files and email
attachments. V.44 compression provides higher data compression ratios,
allowing for more information to be downloaded in the same amount of time.
For a list of some of the ISPs which do support v92 (and it's growing
daily), go to:
http://www.v92.com/v92isp/