EXFO FTB-800 Series for FTB-1 - Manual (Page 221)

Test Setup - Test Configurator, Timer, and System
NetBlazer 211
Signal - Signal Configuration (DSn/PDH)

Force Release / Activate / Release

Force Release button, available with Auto-Response mode,
allows to release a loopback condition initiated from the network.
Only available when a loopback is active.

Activate button, available with Manual mode when no loopback is
active, allows to send a loopback condition.

Release button, available with Manual mode when a loopback is
active, allows to release the loopback condition.

Loop-Up indicates the selected loop up code.

Loop-Down indicates the selected loop down code.

Modify Loop Codes button: See Modify Loop Codes button on
page 209 for more information.
Out-of-Band loop code Loop-UP Code Loop-Down Code
Line 00001110 11111111 00111000 11111111
Payload 00010100 11111111 00110010 11111111
Reserved For Network Use 00010010 11111111 00100100 11111111
ISDN Line (NT2) 00101110 11111111 00100100 11111111
CI/CSU Line(NT1) 00100000 11111111 00100100 11111111