ADTRAN HDSL2 - Manual (Page 86)

MUX Mode Test Access HDSL2 for General Distribution Installation and Maintenance Practice
C-4 61223HDSL2L2-5B
MUX MON, Rx from Customer
The Rx of the BERT receives data from the
RX MON
jack ( Figure C-5 ). This data is 432 ohm
copy of the data that the H2TU-C will receive from the customer and route to the Total Access
shelf's MUX (network). The Tx of the BERT is not used. This test is non-intrusive.
Figure C-5. MUX MON, Rx from Customer
MUX EQ, Tx to Network, Rx from the Network
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-6 ). The Tx of the BERT is then substituted for the data that the H2TU-C
sends to the Total Access Shelf’s MUX (network). The Rx of the BERT receives data directly
from the MUX (network). 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 Network
mode. In the
To Network
mode, AIS (unframed all 1’s) is sent in the customer
direction.
Figure C-6. MUX EQ, Tx to Network, Rx from Network
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
TX
RX
T1 BERT
From DSX
To DSX
From CUST
To CUST
From MUX
To MUX
432 Ω
432 Ω