Verilink C100 (880-502893-001) Product Manual Manual de usuario Pagina 46

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LED Indicators and Diagnostics
4-6
Verilink C100 and C150 T1/FT1 CSU/DSU
6/15/99
C150 examples
Figure 4-4 C150 T-1 CSU/DSU in Local NI Loopback
Figure 4-5 C150 T-1 CSU/DSU in Local NI Loopback
Local DSX1 channel
loopback
The Local DSX1 Channel LOOPBACK LED is on solid when it is
selected by the Select push-button. When the Local DSX1 Channel
LOOPBACK LED blinks at a fast rate, the T-1 CSU/DSU has the DSX1
(Customer T-1 interface) looped back onto itself (see circled loop in
Figure.) and was activated locally. When the Local DSX1 Channel
Loopback LED blinks at a slow rate the T-1 CSU/DSU has the DSX1
(Customer T-1 interface) looped back onto itself but was activated by
the carrier provider or the remote unit sending a V.54 command. When
this loopback is activated, data continues to be transmitted to the
customer equipment. The color of this LED is red.
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
PBX
Bridge
PBX
Bridge
NI
N
I
NETWORK
Router Router
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
PBX
Bridge
PBX
Bridge
NI
N
I
NETWORK
Router Router
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