ADC HDSL4, H4TU-C-319 List 1 Line Unit user manual Loopback Modes

Testing LTPH-UM-1031-03, Issue 3

DSX-1

H4TU-C

H4TU-C

H4TU-C

H4TU-C

NLOC

4-in-7

H4TU-C

Loopbacks Toward Network

HDSL4 SPAN

	HDSL4 SPAN				11000
					FF02 ￿
					C742 ‡
	HDSL4 SPAN				1110000
	FF04 ￿			FF06￿
	C741 ‡			C754 ‡
	NDU1			NDU2
SPAN 1	2-in-6	SPAN 2	3-in-6		SPAN 3
	110000		111000
	H4D1			H4D2
FF1E ￿
D3D3 ‡
1111000	HDSL4 SPAN

TLOS*

LOGIC H4TU-R

SMJK*

2-in-5 H4TU-R

NREM*

3-in-7

H4TU-R

H4TU-R

H4TU-R

All ones

All ones

All ones

All ones

All ones

Customer Interface

CREM

All ones 6-in-7

H4TU-C

All ones H4TU-C

All ones H4TU-C

H4TU-C

COLB

3F1E ￿	Loopbacks Toward Customer
D3D3 ‡
1111110		HDSL4 SPAN					H4TU-R
						3F02 ￿
						C742 ‡	CLOC
		HDSL4 SPAN				1111100	5-in-7
							H4TU-R
		3F04 ￿			3F06 ￿
		C741 ‡			C754 ‡
		CDU1		CDU2
	SPAN 1	4-in-6	SPAN 2		5-in-6	SPAN 3	H4TU-R
		111100			111110
		H4D1			H4D2

Bidirectional (Dual) Loopbacks
H4D1	H4D2	H4TU-R
D1LB	D2LB	RULB

CI-

*Set the NLBP option to AIS to send AIS (indicated by an all ones pattern) for any network loopback.

￿A3LB loopback codes.

‡A5LB loopback codes.

GNLB loopback codes.

Figure 29. Loopback Modes

50 September 12, 2003 H4TU-C-319 List 1