NEC Neax 2400 Imx Message Center Interface Instruction Manual

ND-70428 (E) CHAPTER 3
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CHAPTER 3 MCI FOR LAN
1. SPECIFICATIONS
1.1 Timing
Timing to Establish a Link : A link is connected when an MC connect request is received.
Timing to Output  Call  Information : When a call terminates to the attendant or a UCD group station,
the call information is sent via the MCI to the MC.
Timing to Receive MWL Information : When Message Waiting Lamp (MWL) information is received,
the MWL of the station served by the PBX is caused to be ON/
OFF.
Timing to...

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Figure 3-1   PBX and MCI for LAN Interface
1.3 Basic Configuration of Text
Data is transferred between the server and client in the unit of a text.
A text, as shown in Figure 3-2, consists of SYN (16H), used as the beginning of a text, a text identifier,
data length, device No., sequence No., message and parity (horizontal parity check system).
The result of the exclusive logical sum of the parity range is set as the parity.
(If the result of the...

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(2) Text Identifier 
The text identifier identifies the data to be sent or received.
Data type : Decimal (ASCII code)
Data size : 1 digit
Data range: 0 to 9
0 : Not used
1 : Lamp Control Text (MC for LAN PBX)
The PBX that received the data sends the result of the received data check as a “Server
Response Text (text identifier (3))” to the MC for LAN in a predetermined time inter-
va l.
2 : Call Information Text (PBX MC for LAN)
The MC for LAN that...

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(4) Device No.
The device No. indicates the device No. for the MC for LAN connected to the server.
The MC for LAN sends its own device No. to the server, and the PBX sends the device No. for the MC
for LAN, which is the destination of the text.
The device No. to be used is defined at the PBX side.
Data type : Decimal (ASCII code)
Data size : 2 digits
Data range: 0 to 99
(5) Sequence No.
The sequence No. is a serial number for the data to be sent.
It...

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(3) Server Response Text (MC for LAN PBX)
Figure 3-5 shows the server response text to be sent by the PBX that received text identifiers (1) and (5)
to notify the MC whether or not the received text is correct.
Response No. (server information)
Data type : Decimal (ASCII code)
Data size : 1 digit
Data range: 0 to 9
0 : Normal
1 : Received text parity error
2 : Device No. not defined
3 : Received text error (incorrect text received)
4 to 9 : Not...

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Figure 3-6   Client Response Text Configuration
(5) Status Monitoring Text (MC for LAN PBX)
The text shown in Figure 3-7 is defined for use in monitoring the server status from the client and the client
status from the server. In response to the text, the server sends a “Server Response Text (3)” to the client.
Client device information
Data type : Decimal (ASCII code)
Data size : 2 digits
Data range: 0 to 99
Data type
00 : Normal
01 to 99 : To be...

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(6) Link Release Text (MC for LAN PBX)
Figure 3-8 shows a link release request to be sent from the client to the server and from the server to the
client. Processing is performed to release the link immediately after the text is received.
 
Figure 3-8   Link Release Text Configuration
S
Y
N
(X)Text
identifier
(6)Data length
(004)Device
 No.
(XX)Sequence
No.
(XX)Parity
(X) 

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2. PROTOCOL AND MESSAGE RESPONSES
2.1 Link Establishment Sequence
Figure 3-9 shows the sequence used when the client requests the server to establish a link.
 
Figure 3-9   Link Establishment Sequence Note:
The client sends a status monitoring text immediately after a link is established.
Client (MC for LAN) Server (PBX)
Connection request (CONNECT)
Connection accepted (ACCEPT)
Status monitoring
Server response textSystem equipment OK
Note
5
00Text...

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2.2 Transmission and Reception of Call Information
(1) Normal Processing Sequence for Transmission and Reception of Call Information
Figure 3-10 shows the normal sequence used when the server sends call information to the client.
 
Figure 3-10   Transmission and Reception of Call Information Sequence
Client (MC for LAN) Server (PBX)
Call information
2Text 
Received data OK Received data check
4
0Text identifier
Response No.