ADTRAN DE-4E Connections, Bantam Jack Description, FT1 DP Bantam Jacks, DSL System Testing

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.

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

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

A1	B1
A2	B2
A3	B3
A4	B4
A5	B5
A6	B6
A7	B7
A8	B8
A9	B9
A10	B10
A11	B11
A12	B12
A13	B13
A14	B14
A15	B15
A16	B16
A17	B17
A18	B18
A19	B19
A20	B20
A21	B21
A22	B22
A23	B23
A24	B24
A25	B25
A26	B26
A27	B27
A28	B28
A29	B29
A30	B30
A31	B31
A32	B32
A33	B33
A34	B34
A35	B35

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

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

TX	Channel Bank
DS0 Interface 1
	Interface
Logic Level - NEAR
RX

Figure 4. Bantam Jack Arrangement

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.

Figure 3. 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

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.

1Logic 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.

6 Section 61245207L2-5, Issue 3 61245207L2-5C