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6 Section 61245207L2-5, Issue 3 61245207L2-5C
Figure 3. FT1 DP Edge Connector Wiring
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5 V Ground
5 V Ground
DS0 Channel Rx Signal
A-Bit Tx Signaling Bus
DS0 Tx Bus Enable
Signaling Bus Enable
Rx Signaling Bus
A-Bit Rx Signaling Strobe
Transmit PCM
Frame Ground
-48 V
-48 V Return
DS0 Bit Clock
HDSL Ring
+5 V
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DS0 Channel Tx Signal
B-Bit Tx Signaling Bus
DS0 Rx Clock
DS0 Tx Clock
Carrier Group Alarm
B-Bit Rx Signaling Strobe
Receive PCM
DS0 Byte Clock
HDSL Tip
3. CONNECTIONS
The FT1 DP occupies one card slot in a Nortel DE-4E
shelf. Power signaling is provided to the card through
the backplane of the channel bank. See Figure 3 for
FT1 DP edge connector wiring.
4. DSL SYSTEM TESTING
The ADTRAN DSL system provides extensive ability
to monitor the status and performance of the DS1
signals and DSL loop signals. These features are
valuable in troubleshooting and isolating any system
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Logic level NEAR loopback on the DS0 interface is toward the outside cable pair. The FT1 DP will support logic level FAR
loopback only in the presence of a BERT or loopback on the network end of the channel bank.
level problems that may occur at installation or during
operation of the FT1 HDSL system. The following
subsections describe additional testing features
conducted with the front panel Bantam jacks as well
as other faceplate features.
Bantam Jack Description
The front panel of the FT1 DP contains DS0 splitting
Bantam jacks. The metallic splitting jacks provide an
intrusive, signal interrupting access to the first DS0
channel. It is very important to know the direction of
the access provided by a metallic splitting jack.
Detailed descriptions of the FT1 DP Bantam jacks are
given in the following subsection. Figure 4 shows the
Bantam jack arrangement and details for specific
jacks.
FT1 DP Bantam Jacks
The FT1 DP provides a set of dual Bantam jacks on
the front panel. These Bantam jacks allow connection
of a Tele-Path Instruments 108/109 RT II (or
equivalent) test set through one DS0 channel at
64 kbps for functions such as sending and receiving
bit error rate signals.
NOTE
The DS0 access jacks are logic level interface.
FT1 DP Loopbacks
There are two loopbacks available to the FT1 DP.
FT1 DP network loopback loops the FT1 signal back
to the network. The FT1 DP CPE loopback loops the
FT1 signal back to the customer. The FT1 system
loopback capabilities are described in detail in
Appendix A of this practice.
Figure 4. Bantam Jack Arrangement
TX
RX
DS0 Interface
Logic Level - NEAR
Channel Bank
Interface
FT1 DP
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