Message Center Interface (Mci) - NEC UNIVERGE NEAX 2000 IPS Reference Manual

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
Data Rate
Operating Mode:
Electrical Interface
Characteristic:
Signal Form:
Interface Distance:
Word Framing:
Parity VRC:
Frame Contents:
Control:
Priority Sequence:
UNIVERGE 2000 IPS Request for Proposal (RFP) Reference Guide
NEAX
Issue 6
1200, 2400, 4800, 9600 bps asynchronous, software selectable
Half duplex
EIA RS-232C electrical standard interface
EIA RS-404
Max. 15 m (49.2 ft.) between PBX and VMS (without modem)
Note: When modems are used, full duplex asynchronous type modems
are required.
10 bits (1 start, 7 data, 2 stop)
No parity, even parity, odd parity; selected by PBX system data
US ASCII 7-bit codes
Contention
Primary station: PBX
Secondary station: VMS
Chapter 19 Voice Messaging Systems
DESCRIPTION
Page 19- 3