ADTRAN HDSL2 - Manual (Page 84)

DSX Mode Test Access HDSL2 for General Distribution Installation and Maintenance Practice
C-2 61223HDSL2L2-5B
Figure C-1. DSX MON, Tx to Customer
DSX MON, Rx from Customer
The Rx of the BERT receives data from the
RX MON
jack ( Figure C-2 ). This data has a monitor
jack impedance of 432 ohms and comes from the customer originated data. The
BERT TX
is not
used. This test is non-intrusive.
Figure C-2. DSX MON, Rx from Customer
DSX EQ, Tx to Customer, Rx from Customer
The Tx of the BERT goes to the
TX EQ
jack, and the Rx of the BERT goes to the
RX EQ
jack
( Figure C-3 ). The
TX EQ
data from the BERT is sent to the customer. The
RX EQ
data to the
BERT is data from the customer. The
MON
jack
TX
and
RX
are 432 ohm replicas of the
EQ TX
and
RX
direct connections. This test is intrusive, as it connects the
EQ
jacks directly to and
from the customer data.
TX
DSX
EQ
RX
TX
DSX
MON
RX
X
From DSX
To DSX
From CUST
To CUST
From MUX
To MUX
TX
RX
T1 BERT
432 Ω
432 Ω
TX
DSX
EQ
RX
TX
DSX
MON
RX
X
From DSX
To DSX
From CUST
To CUST
From MUX
To MUX
TX
RX
T1 BERT
432 Ω
432 Ω