ADTRAN HDSL2 - Manual (Page 87)

HDSL2 for General Distribution Installation and Maintenance Practice MUX Mode Test Access
61223HDSL2L2-5B C-5
MUX EQ, Tx to Customer, Rx from Customer
The Tx of the BERT is connected to the
EQ TX
jack, and the Rx of the BERT is connected to the
RX EQ
jack ( Figure C-7 ). The Tx of the BERT is then substituted for the data that the H2TU-C
sends to the customer. The Rx of the BERT receives data directly from the customer. The
MON
TX
and
RX
jacks are 432 ohm impedance copies of the
EQ
jack
TX
and
RX
. This test is
intrusive. Via the
Test
screen, ensure that the equipment jack is in the
To Customer
mode. In
the
To Customer
mode, AIS (unframed all 1’s) is sent in the network direction.
Figure C-7. MUX EQ, Tx to Customer, Rx from Customer
TX
DSX
EQ
RX
TX
DSX
MON
RX
TX
RX
T1 BERT
From DSX
To DSX
From Selected CUST
To Selected CUST
From MUX
To MUX
432 Ω
432 Ω