NEC Mcu 5000a Multipoint Control Unit Equipment Manual

NECA 340-4 14- 30 0  Revisio n 2.0   Page 1 o f 2
MCU  5000A Multipoint Control  U nit   CO P-N07
RCNQ
 g ¿
n1n2…  OK
A ¿
001002OK 

Page 2 of 2 NECA 340-414-300 Revision 2.0
COP-N07 MCU 5000A Multipoint Control Unit
This page is for your notes. 

NECA 340-414-300 Revision 2.0 Page 1 of 2
MCU 5000A Multipoint Control Unit Appendix
INS Net Error Reasons
Number Display the Reasons (ERROR from Net) Correspondence
1
2
3
6
7
16
17
18
19
21
22
26
27
28
29
30
31Unused number
No route to specific relay net
No route to terminating
Cannot use channel
Caller arrives to channel which already setup
Normal disconnect
Arriving user is busy
Arriving user no resource
Arriving user calling/no response
Reject the transmission
Modified terminal number that is...

Page 2 of 2 NECA 340-414-300 Revision 2.0
Appendix MCU 5000A Multipoint Control Unit
900
901
903
904
905
906
908
909
910
912
913No response from terminating, even after 50 seconds of calling
At calling, line (Layer 1) is abnormal
At calling, line (Layer 2) is abnormal
TEI is mismatched
At calling, line (Layer 3) is abnormal
When receiving the request of initialization, set up is received from NET, it will be 
reported to the upper level
Time out occurs when standing by for restart response
When call or...

NECA 340-414-500
ISSUE 2
DOI-G05187
PART OF STOCK # 0293922
MAINTENANCE MANUAL
SEPTEMBER, 1998
NEC America, Inc.
MCU 5000A MULTIPOINT 
CONTROL UNIT 

LIABILITY DISCLAIMER
NEC America, Inc. reserves the right to change the specifications,
functions, or features, at any time, without notice.
NEC America, Inc. has prepared this document for use by its em-
ployees and customers. The information contained herein is the
property of NEC America, Inc. and shall not be reproduced without
prior written approval from NEC America, Inc.  
Copyright 1998
NEC America, Inc.
Printed in USA 

NECA 340-414-500 Revision 2.0Page i
MCU 5000A Multipoint Control Unit Table of Contents
Table of Contents
INTRODUCTION .................................................................................................  INT-001
CHECK ON POWER SYSTEM ..........................................................................  TCP-001
IMPLEMENTATION OF C&I LOOPBACK FUNCTION .....................................  TCP-002
SETTING OF MCU 5000A LOOPBACK POINTS.................................................

Page iiNECA 340-414-500 Revision 2.0
Table of Contents MCU 5000A Multipoint Control Unit
This page is for your notes. 

NECA 340-414-500 Revision 2.0 Page 1 of 14
MCU 5000A Multipoint Control Unit INT-001
INTRODUCTION
1.  GENERAL
1.01This practice provides maintenance and trouble clearing of 
Multipoint 
Control Unit 5000A (MCU 5000A). 
2.  OVERVIEW
2.01This equipment does not require periodical maintenance under normal 
operating conditions.  However, users are recommended the periodical check  
described in Section 3, and in case of failure perform troubleshooting in 
accordance with the descriptions given in this...

Page 2 o f 14   NECA 340 -41 4-5 00 Revisi on  2.0
INT-001   MCU 5000A Mult ipoint Con trol Unit
3.  PERIODICAL CHECK