Verilink C100 (880-502893-001) Product Manual Manual de usuario Pagina 47

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LED Indicators and Diagnostics
6/15/99
C100 and C150 T1/FT1 CSU/DSU
4-7
Figure 4-6 C150 DSX-1 CSU/DSU in Local Channel Loopback
Local Synchronous
Channel Loopback
The Local Synchronous Channel LOOPBACK LED is on solid when it
is selected by the Select push-button. When the Local Synchronous
Channel LOOPBACK LED blinks at a fast rate, the T-1 CSU/DSU has
the Channel interface in a bidirectional loopback (see circled loop in
Figure 4-7.) and was activated locally. When the Local Synchronous
Channel Loopback LED blinks at a slow rate the T-1 CSU/DSU has the
Channel in a bidirectional loopback but was activated by the carrier
provider or the remote unit sending a V.54 command. The color of this
LED is red.
Figure 4-7 C100 T-1 CSU/DSU in Local CI Channel Loopback
Figure 4-8 C150 T-1 CSU/DSU in Local CI Channel Loopback
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
Channel
Remote T-1 CSU/DSU
Pattern
Checker
Pattern
Generator
T-1 CSU
Channel
Local T-1 CSU/DSU
Bridge
Bridge
N
I
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 CSUDSX1
Channel
Local T-1 CSU/DSU
PB
Bridge
PB
Bridge
NI
N
I
NETWORK
Router
Router
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