Electra Elite
Issue 6
System Hardware Manual
5 - 47
Cyclic Redundancy Check (CRC) Error Event
Detection
When a CRC Error occurs, the LED lights red.
Active Call
LED Lights red to indicate an active call.
4.8.6
Connectors
The PRT(1)-U10/20 ETU has two connectors:
CN1
Connects to the backboard
CN3
9-pin RS-232C connector used for
maintenance
4.8.7
Connections
Figure 5-27PRT(1)-U10/20 ETU Connector
MDF
TA
TB
RA
RB
ISDN PRI
Provider
CSU
The CSU may not always be required.
ISDN
PRI
Summary of Contents for Electra Elite 192
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Page 52: ...Issue 6 Electra Elite xxxii List of Tables THIS PAGE INTENTIONALLY LEFT BLANK ...
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Page 74: ...Issue 6 Electra Elite 1 22 Introduction ...
Page 96: ...Issue 6 Electra Elite 2 22 System Specifications ...
Page 104: ...Issue 6 Electra Elite 3 8 Hardware Requirements THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 213: ...Electra Elite Issue 6 System Hardware Manual 5 67 Figure 5 39 FMS 8 U10 ETU ...
Page 336: ...Issue 6 Electra Elite 7 54 Installing Optional Equipment THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 368: ...Issue 6 Electra Elite A 4 Glossary of Abbreviations THIS PAGE INTENTIONALLY LEFT BLANK ...
Page 369: ...SYSTEM HARDWARE MANUAL NEC America Inc Issue 6 Series 6000 192 ...