ADTRAN 1181413L2, Installation And Maintenance Manual

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61223HDSL4L2-5C C-1
Appendix C
Front Panel DSX and MUX Mode Test Access
GENERAL
Figure C-1 through Figure C-3 are DSX-1 fed modes of operation, and Figure C-4 through
Figure C-7 are MUX fed modes of operation. From the Provisioning menu ( Figure 16 on page
25), Network Source is used to choose either MUX fed or DSX fed. When performing intrusive
MUX mode testing, the equipment jack on the front panel can be configured to access the
signal going to the Network or the Customer. The Equipment Jack option on the loopback and
Test Commands screen (
Figure 23 on page 31) is used to configure this jack for the network or
customer. Every time the HTU-C is power-cycled, it will default to the Customer direction.
DSX MODE TEST ACCESS
DSX MON, Tx to Customer
The Rx of the BERT receives data from the
TX MON
jack ( Figure C-1 ). This data has a monitor
jack impedance of 432 ohms and comes from the Backplane Network T1 DSX (the data that
would go toward the customer). The
BERT TX
is not used. This test is non-intrusive .
NOTE
The H4TU-C must be provisioned for the Out-of-Service
Maintenance service state when intrusive bantam jack testing is
being performed.
Figure C-1. DSX MON, Tx to Customer
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