NEC Mcu 5000a Multipoint Control Unit Equipment Manual

NECA 340-414-100 Revision 2.0Page 9
MCU 5000A Multipoint Control Unit General Description Manual
• Any still picture signal can be sent to all of the terminals.  ([STILL SEND] 
key on remote controller)
• The camera sending the signals can be controlled remotely from receiving 
terminal.  ([LC/RT] key on remote controller.)
• Message tone can be sent to all of the terminals.
• Message can be sent optionally to the any terminal.
• Remote control operation can be inhibited by console.
• The control...

Page 10NECA 340-414-100 Revision 2.0
General Description Manual MCU 5000A Multipoint Control Unit
• When the classroom permitted to originate does not exist, the instructor 
site has the application to switch receiving video signal temporally by 
[SITE SELECTION] key. When its existence, [SITE SELECTION] key is 
not prohibited.
• [SLCT RCV] key operation of the instructor site can select the receiving 
picture to the instructor site. In receive selecting mode, the other function 
keys ([TK ALW] key etc.)...

NECA 340-414-100 Revision 2.0Page 11
MCU 5000A Multipoint Control Unit General Description Manual
E: Teleconference 
Start and 
Completion3.15
The teleconference start and completing operation is performed by the 
console command.  Refer to 
NECA 340-414-300.
• Point-to-Point teleconference
Start: BCON command (Point-to-point connection)
Completion: BDSC command (Point-to-point connection release)
• Broadcasting teleconference
Start: UCON command (One way direction connection)
LCON command (One way...

Page 12NECA 340-414-100 Revision 2.0
General Description Manual MCU 5000A Multipoint Control Unit
F: Line and 
Teleconference 
Terminal Number 3.16
The MCU 5000A accommodates the plural lines.  To simultaneously 
perform the plural terminals, the line and teleconference terminal numbers is 
assigned.  The line and teleconference terminal numbers are as follows.
• Physical line number (1 to 16)
• Logical line number (1 to 254, or 0)
• Teleconference port number (1 to 8)
• Teleconference terminal number (1...

NECA 340-414-100 Revision 2.0Page 13
MCU 5000A Multipoint Control Unit General Description Manual
3.19
The logical line number is assigned 1 through 254 from LIF1 to LIF4 in 
sequence within the logical line number range of system parameter.  The 
assigning requirement of more than two logical line number per physical line is 
available for the multiplexer (MMM) usage.
When the line rate is 1536 kbps (T1×2 unit installation) and the logical line 
number is six, to MCON-connect the physical line number 1...

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General Description Manual MCU 5000A Multipoint Control Unit
G: Logical Line 
Number 
Assignment on 
ISDN Interface 
Unit Installation3.20
This requires the different procedure with minimum line rate (system 
parameter) setting.  The logical line number is assigned according to the relation 
of minimum line rate and communication rate as shown in the Fig. 3-3, 3-4, and 3-
5.
(a)  Communicating by 64 kbps
(b)  Communicating by 2×64 kbps
(c)  Communicating by 384 kbps...

NECA 340-414-100 Revision 2.0Page 15
MCU 5000A Multipoint Control Unit General Description Manual
(a)  Communicating by 64 kbps
(b)  Communicating by 2×64 kbps
(c)  Communicating by 384 kbps
Figure 3-4:   Logical Line Number Assignment (Line Rate 2×64 kbps)
024Logical Line Number
LIF1
LIF2 (Time Slot)
....................
....................
....................12
310
11
13 14
15
2223
25
26 2734
35
024Logical Line Number
LIF1
LIF2 (Time Slot)
....................
.......................

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General Description Manual MCU 5000A Multipoint Control Unit
(a)  Communicating by 64 kbps
(b)  Communicating by 2×64 kbps
(c)  Communicating by 384 kbps
Note: 
 The assignment of logical line number by the number of lines conforms to 
T1 interface.
Figure 3-5:   Logical Line Number Assignment (Line Rate 384 kbps)
024Logical Line Number
LIF1
LIF2 (Time Slot)
123
7 5
10 116
9
024Logical Line Number
LIF1
LIF2 (Time Slot)
123
7 5
10 116
9
024Logical Line Number
LIF1
LIF2...

NECA 340-414-100 Revision 2.0Page 17
MCU 5000A Multipoint Control Unit General Description Manual
Teleconference Port Number
3.21
The MCU 5000A provides maximum eight points in multipoint 
teleconference.  MUX unit port number in that multipoint teleconference is called  
the teleconference port number that is the value of 1 through 8. Eight-point 
teleconference contains the value of 1 through 8, and 4-point teleconference 
contains the value of 1 through 4 in the valid teleconference port number.  When...

Page 18NECA 340-414-100 Revision 2.0
General Description Manual MCU 5000A Multipoint Control Unit
H: Line Interface 3.23
The MCU 5000A provides the following 3 types of LIF unit for the line 
interface.  The MCU 5000A accommodates maximum four individual LIF units.  
Mixed LIF unit combination is also available.  The individual interfaces are 
identified automatically by software.  Any item of the line rate and line number  
etc.   In the system parameter is required as following per each unit.
1.5M LIF...