Chapter 1
6
1.6 System Inter-operability
The
ADSL
device’s
implementation
of
protocol
standards
ensures
inter-operability with PCs, LANs, Routers, Servers and Central Office
equipment such as voice and ATM switches. It also provides inter-operability
on the Physical, Data Link and Network layers.
The
Physical
Layer
includes
the
hardware
and
electrical
signaling
characteristics supported by the ADSL device’s Ethernet and IP router
interfaces. Compliance to ITU ADSL standards guarantees connectivity of the
ADSL device to the DSL Access Multiplexer (DSLAM) ports.
The Data Link Layer defines the transmission path of the data packets between
the two systems over the LAN and WAN physical links.
Figure 4: The AT-AR240E’s 10BaseT Ethernet port attaches directly to a
PC Ethernet port or an external Ethernet hub.
Figure 5: Any of the 4 Ethernet ports of the AT-AR250E attach directly to a
PC Ethernet port or an external Ethernet hub.
DSL
ETHERNET
USB
POWER
RJ-11
RJ-45
12V
ON
OFF
DSL
ETHERNET
USB
POWER
RJ-11
RJ-45
