22 Lucent Technologies Inc.
HW3000M/HW2000
Home Wire
Preliminary Product Brief
Home Phoneline Networking Physical Layer August 2000
Description
The Lucent Technologies Microelectronics Group’s
HW3000M/HW2000
Home Wire
PHY is a highly inte-
grated solution designed to quickly add high-speed net-
working over existing, residential telephone wiring to
existing products, such as 10/100 Mbits/s Ethernet
designs. The
Home Wire
PHY provides a direct con-
nection to an external
IEEE
802.3 MAC or to a USB-to-
Ethernet controller through its
IEEE
802.3u-compatible
MII. The
Home Wire
PHY provides automatic rate
adaptation, instantaneously adjusting to the changing
electrical characteristics of the home phoneline com-
munications channel, in order to select the optimal
speed which can reach a maximum of 16 Mbits/s.
The two-de vice HW3000M/HW2000
Home Wire
PHY
fully supports the
HomePNA
Interface Specification
2.0. The
HomePNA
was formed to develop specifica-
tions for interoperable, home networked devices that
use existing residential telephone wiring, regardless of
the topology. The chip set is also fully compliant with
the
HomePNA
PHY Specification Revision 1.1, in order
to provide backwards compatibility with existing appli-
cations and home phoneline networks built around
HomePNA
1.1 technology.
In order to provide a robust, cost-eff ective, and simple-
to-use home phoneline networking solution, the
Home
Wire
PHY is compatible with the existing
IEEE
802.3u
MII specification. Up to 25 PCs, peripherals, or network
devices can be installed on a single home phoneline
network that can span up to 1000 f eet between the two
farthest points.
The HW3000M/HW 200 0
Home Wire
PHY is fully com-
patible with existing phone services such as voice, fac-
simile, V.90/V.92 modem connections, ISDN voice and
data, ADSL, and G.Lite. Products based on the
Home
Wire
PHY will not compromise or interrupt any of these
services. Frequency division multiplexing (FDM) tech-
nology is used to simultaneously support existing and
emerging telephone services along with networked
HomePNA
data traffic. The frequency ranges f or
HomePNA
based products have been carefully
selected to avoid interference from these various ser-
vices that may be encountered in a typical home. As
shown in Figure 1, signals from the
Home Wire
PHY
are centered at 7 MHz, with the signal ranging from
4.25 MHz to 9.75 MHz. This frequency range is well
above the frequencies used for existing phone ser-
vices.