Verilink C100 (880-502893-001) Product Manual - Manual (Page 51)

LED Indicators and Diagnostics
6/15/99 C100 and C150 T1/FT1 CSU/DSU 4-11
Figure 4-16 Local C100 sending pattern to network with remote T-1 CSU in NI loopback
Figure 4-17 Local C100 CSU/DSU sending 2047 pattern to channel in local loopback
C150 Test Pattern
The Test Pattern LED is solid red when it is selected by the Select push-
button. Pushing the Start push-button when this LED is lit, will cause a
2047 test pattern to be sent and the Test Pattern LED to blink red at a
fast rate. The 2047 pattern will always be sent from the T-1 CSU/DS
to the Network (see circled area in example in Figure 6.8.) unless a
Local CI DSX1 or a Local CI Channel Loopback (see circled area i
example in the Figure) has been selected. The 2047 pattern checker will
look for a 2047 pattern from the Network, and if detected, will light the
Test Pattern LED green. If a Local CI DSX1 or Channel Loopback has
been activated, the 2047 test pattern will be sent to the DSX1 or
Channel and the 2047 pattern checker will look for the pattern from
either the DSX1 or Channel depending on the selected loopback. The
Test Pattern LED is a dual color red/green LED.
Figure 4-18 Local C150 sending pattern to network with remote T-1 CSU in NI loopback
Pattern
Checker
Pattern
Generator
T-1 CSU Channel
Remote T-1 CSU/DS
Pattern
Checker
Pattern
Generator
T-1 CSU Channel
Local T-1 CSU/DSU
Bridge Bridge
NI NI
NETWORK Router Router
Pattern
Checker
Pattern
Generator
T-1 CSU Channel
Remote T-1 CSU/DS
Pattern
Checker
Pattern
Generator
T-1 CSU Channel
Local T-1 CSU/DSU
Bridge Bridge
NI NI
NETWORK Router Router
Bridge
Pattern
Checker
Pattern
Generator
T-1 CSU DSX1
Channel
Remote T-1 CSU/DSU
Pattern
Checker
Pattern
Generator
T-1 CSU DSX1
Channel
Local T-1 CSU/DSU
PB PB
Bridge
NI NI
NETWORK
Router Router