EXFO FTB-8510B Guia Del Usuario página 727

In-Band loop code
CSU
NIU FAC1
NIU FAC2
NIU FAC3
Loop Code1 to 10
User Defined
Out-of-Band loop code
Line
Payload
Reserved For Network Use 00010010 11111111
ISDN Line (NT2)
CI/CSU Line(NT1)
3e. Press Next or Finish.
SONET/SDH Application
Select the Loop Code:
Loop-UP Code
10000
1100
11000
100000
Refer to DSn Loop Codes on page 543 for more information.
Loop-Up and Loop-Down range is from 000 to
1111111111111111. The default DS1 loop codes
correspond to the DS1 In-Band loop codes
(Loop-Up=10000, and Loop-Down=100).
Loop-UP Code
00001110 11111111
00010100 11111111
00101110 11111111
00100000 11111111
The Loop-UP and Loop-Down values are automatically updated
to the In-Band or Out-of-Band selection (Type). However these
fields are editable when the Loop Code is set to User Defined.
The Force Release button allows to release a loopback condition
initiated from the network. Only available when a loopback is
active.
The Loopback Active LED indicates the presence of an active
loopback.
Creating and Starting a Test Case
Loop-Down Code
100
1110
11100
100
Loop-Down Code
00111000 11111111
00110010 11111111
00100100 11111111
00100100 11111111
00100100 11111111
Typical Test Cases
77