Appendix C
Test Patterns and Loop Codes
Loop codes
206
CT-650 Command-Line Reference Guide
Release 9.4
Loop codes
The following codes are available for looping DS1 circuits.
1010
1010
0000
0001
0000
0001
0000
0001
0000
0001
0000
0001
0000
0001
1111 1111 1111 1111 1111 1111
41
42
43
44
45
46
47
48
49
50
FFH
FFH
FFH
80H
01H
80H
01H
80H
01H
80H
1111 1111 1111 1111 1111 1111
1000
0000
0000
0001
1000
0000
0000
0001
1000
0000
0000
0001
1000
0000
51
52
53
54
55
01H
80H
01H
80H
01H
0000
0001
1000
0000
0000
0001
1000
0000
0000
0001
Table 23
T1_DALY test pattern sequence (Continued)
Table 24
Loop codes
Code
Description
CSU
Selects in-band DS1 customer service unit loop codes. Transmits a
loop-up code of 10000 and a loop-down code of 100.
FAC1
Selects in-band DS1 4-bit facility or network (or smart jack) loop codes.
Transmits a loop-up code of 1100 and a loop-down code of 1110.
FAC2
Selects in-band DS1 5-bit facility or network (or smart jack) loop codes.
Transmits a loop-up code of 11000 and a loop-down code of 11100.
FAC3
Selects in-band DS1 6-bit facility or network (or smart jack) loop codes.
Transmits a loop-up code of 100000 and a loop-down code of 100.
PROG
Selects in-band DS1 3- to 8-bit programmable loop codes. The loop-up
and loop-down codes are programmed through the DS1
Prog_Loop
command.
ESF-LIN
Selects ESF out-of-band line loop codes. Transmits a loop-up code of
1111 1111 0111 0000 and a loop-down code of 1111 1111 0001 1100.
ESF-FAC
Selects ESF out-of-band facility or network loop codes. Transmits a
loop-up code of 1111 1111 0100 1000 and a loop-down code of 1111
1111 0010 0100.
Summary of Contents for CT-650
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