MUX Mode Test Access
HDSL4 for General Distribution Installation and Maintenance Practice
C-4
61223HDSL4L2-5C
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
). The Tx of the BERT is then substituted for the data that the H4TU-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
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
). The Tx of the BERT is then substituted for the data that the H4TU-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 CUST
To CUST
From MUX
To MUX
432 Ω
432 Ω
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
