NEC 2000 IPS manual Description

Chapter 19 Voice Messaging Systems

9.Multiple Call Forwarding: When the final destination for any combination of Multiple Call Forwarding is the VMS, calls can be transferred to the VMS. The first forwarded station's number is sent to the VMS. For example, a call is received by Station A, which is forwarded to Station-B, which is forwarded to Station-C, which is forwarded to VMS. The number of Station-A is sent to the VMS.

10.Ringing Transfer to an Attendant via the VMS: The system allows the VMS to transfer the station or outside party to the Attendant and releases before the Attendant answers.

11.When the VMS is recalled, by transferring the call to an unanswered station, the system may be programmed to send the recalling extension number to the VMS.

12.A maximum of 26 digit extension numbers including DTMF signal after the VMS answered, can be programmed to a One Touch key of a Multiline Terminal.

Message Center Interface (MCI)

This feature provides an interface to the Voice Mail System (VMS), which can send Message Waiting lamp and other control data to the system. The Message Center Interface (MCI) can provide the following operations:

1.When terminating the call to the VMS, the system sends call connection status information to the VMS through the MCI.

2.The VMS sends the Message Waiting Lamp on data to the MCI.

3.The system, upon receiving this control data from the MCI, illuminates the Message Waiting lamp of the corresponding station.

4.The VMS, upon receiving retrieved message information, will send the Message Waiting lamp control data requesting the system to extinguish the Message Waiting lamp of the corresponding station.

5.The MCI interface is a half-duplex, EIA-RS232C, asynchronous serial data link that operates under a specific message protocol and format. The characteristics of the link, the protocol used, and the message text are shown below.

ITEM	DESCRIPTION
Data Rate	1200, 2400, 4800, 9600 bps asynchronous, software selectable
Operating Mode:	Half duplex
Electrical Interface	EIA RS-232C electrical standard interface
Characteristic:
Signal Form:	EIA RS-404
Interface Distance:	Max. 15 m (49.2 ft.) between PBX and VMS (without modem)
	Note: When modems are used, full duplex asynchronous type modems
	are required.
Word Framing:	10 bits (1 start, 7 data, 2 stop)
Parity VRC:	No parity, even parity, odd parity; selected by PBX system data
Frame Contents:	US ASCII 7-bit codes
Control:	Contention
Priority Sequence:	Primary station: PBX
	Secondary station: VMS

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