Verilink C100 (880-502893-001) Product Manual - Manual (Page 83)

Performance Monitoring with the Console Port
06/17/97 C100 and C150 T1/FT1 CSU/DSU 8-7
the field displays Off. Since this loopback latches the unit at the other
remote, care must be taken to ensure that the Loop Off command is
sent when finished testing.
Remote DSX-1 loop
(C150) Pressing the ENTER key while on the Remote DSX-1 Loopback when
Off is displayed will cause the display to go to On and will send a V.54
Loop On command to the DSX-1 interface at the remote. If the display
is On, pressing the ENTER key will send a V.54 Loop Off command to
the remote unit and the field will display Off. Since this loopback
latches the unit at the other remote, care must be taken to ensure that
the Loop Off command is sent when finished testing.
Test pattern (C100) Pressing ENTER when on the Test Pattern field when Off is displayed
causes the built-in 2047 test pattern to be sent. The 2047 pattern always
is sent from the T-1 CSU/DSU to the Network (see circled area in
example in
Figure 4-14 ) unless a Local CI Channel Loopback (see
circled area in the example in Figure 4-17 ) has been selected. If no local
loopbacks are present, the 2047 pattern checker looks for the 2047
pattern from the Network. If a Local CI Channel Loopback has been
activated, the 2047 test pattern is sent to the Channel and the 2047
pattern checker looks for the pattern from the Channel. When the Test
Pattern is On, Test Seconds and Errored or Error Free Seconds is
counting as described in the next paragraph. Pressing the SPACE bar
when on this selection advances the cursor to Local NI Loop.
Test pattern (C150) Pressing ENTER when on the Test Pattern field when Off is displayed
will cause the built-in 2047 test pattern to be sent. The 2047 pattern will
always be sent from the T-1 CSU/DSU to the Network unless a Local
CI DSX-1 or a Local CI Channel Loopback has been selected. (See
Chapter 4, LED Indicators and Diagnostics.) If no local loopbacks are
present, the 2047 pattern checker will look for the 2047 pattern from
the Network. If a Local CI DSX-1 or Channel Loopback has been
activated, the 2047 test pattern will be sent to the DSX-1 or Channel
and the 2047 pattern checker will look for the pattern from either the
DSX-1 or Channel depending on the selected loopback. When the Test
Pattern is On, Test Seconds and Errored or Error Free Seconds will be
counting as described in the next paragraph. Hitting the SPACE bar
when on this selection will advance the cursor to Local NI Loop.