Lucent Technologies 7820-0657-001 - Manual (Page 13)

DSLPipe DSU architecture
DSLPipe DSU (SDSL) User’s Guide 1-3
Figure 1-2 illustrates how you can use a DSLPipe DSU as COE.
Figure 1-2. Example: Using a DSLPipe DSU as COE
The DSLPipe DSU in Figure 1-2 accepts HDLC data from V.35 Router A. The
unit converts the data into SDSL format and sends it, via a WAN link, to another
DSLPipe DSU that is configured as CPE. That unit then sends the data to V.35
Router B.
DSLPipe DSU architecture
Figure 1-3 illustrates the DSLPipe architecture.
Figure 1-3. DSLPipe DSU architecture
The DSLPipe DSU driver picks up the HDLC data and sends it to the Ethernet
controller for processing. The data is sent via the bus to the SDSL chip. The chip
converts the data to RFC 1490 packets and sends it across a WAN link to another
device.
DSLPipe DSU
(as COE)
WAN
V.35 Router A V.35 Router B DSLPipe DSU
(as CPE)
F
ron
t pl
ane
Flash
ROM
C
P
U (HDLC
,
10/
10
0 Et
h
ernet
R
ear
plane
SDSL
2B1Q
Debugging RS-232
10/100 Base Ethernet
V.35 driver
LED
Common bus