User guide

DS3 Test
Multi Protocol Test Set 253
DS3 Loopbacks
³ LoopUp sends the selected loop up command.
³ LoopDown sends the selected loop down command.
³ CSU/NIU Emulation is available when Term mode (Term-DSX or Ter m
DSX-HI) and C-bit framing are selected from the setup page. Allows to
activate the CSU/NIU Emulation mode.
The status of the loopback is displayed in the field located at the bottom of
the screen.