ND-20292
APRIL, 1990
CHAPTER 8

VOICE MAIL INTEGRATION

TABLE OF CONTENTS

SECTION DESCRIPTION

810 GENERAL

820 SPECIFICATIONS

820.1 General Information
820.2 Signaling Parameters
820.3 Additional Functions
820.4 Hardware Requirements
820.5 Hardware Installation

830 PROGRAMMING

830.1 Required Programming
830.2 Recommended
Programming

SECTION 810

GENERAL

PAGE

800-l
800-l
800-l
800-l
800-2
800-2
800-2
800-2
The Voice Mail Interface ETU (VMI-El provides the
Electra Mark11 Digital Telephone System with the
ability to support selected Voice Mail and/or dictation
equipment, or Single Line Telephones. The types of
equipment and the methods of connection will
determine the level of integration.
The VMI-E ETU will support (when used with Voice
Mail equipment that provides the following features):
a. Internal access to a Voice Mail system via
Hunt Group.
b. In Band Message Waiting Indications (Set and
Cancel).
c. Direct access to the Voice Mail system by an
outside party.
d. Call placement by the Voice Mail System.
e. DTMF controlled dial dictation equipment.
f. Single Line Telephones.
g. Modems.

SECTION 820

SPECIFICATIONS

820.1 GENERAL INFORMATION
The VMI-E ETU provides four discrete, two way
communications channels that are used for interfacing
a Voice Mail system, dictation equipment, Single Line
Telephones, or modemS. Each VMI-E ETU channel is
equipped with a DTMF generating circuit which sends
DTMF signaling to the equipment. DTMF signaling
allows telephones in the system to communicate with
the Voice Mail or dictation equipment via dial pad.
820.2 SIGNALING PARAMETERS
Signal timing parameters are assigned to the VMI-E
ETU channels via programming of the Electra Mark11
system.
NOTE: Dial Pulse (Rotary) Signaling is not
supported by the VMI-E ETU.
820.3 ADDITIONAL FUNCTIONS
In addition to voice path and signaling functions, the
VMI-E ETU provides ringing signal control and a path
to the MFR-EA ETU. This allows certain Voice Mail
equipment to dial internally for Voice Message
delivery (call placement), access outside lines, and the
setting and cancelling of Message Waiting indication
using in-band DTMF signaling.
If an incoming DIT call is forwarded to a VMI-E
channel, the original extension number can be
automatically sent to the VMI-E ETU channel using
in-bound DTMF signaling after the Voice ,Mail
Equipment answers the call. This additional function
is a programmable option. (CPU-EB3 ETU or higher
revision level is required.)
NOTE 1:
NOTE 2:.
NOTE 3:
The VMI-E ETU is designed to pass access
codes from the Voice Mail Equipment, for
handling Voice Message Waiting
Indications.
The Voice Mail system must be capable of
providing 2 different access codes, followed
by the extension number of the associated
station. One code is used to set the
Message Waiting indication, while the
second code is used to cancel it.
Default Voice Mail Message Waiting
access codes are 541xxx to set and 54*xxx
to cancel (xxx is an extension number) a
Message Waiting indication.
800 - 1