Nigel Allen <Nigel.Allen@f438.n250.z1.fidonet.org> (05/19/91)
AWMI, also known as "stutter" dial tone, was previously limited to
Centrex customers. Along with visual message waiting indication (VMWI,
a new service for voice mail), it will be available to third-party
voice mail services, but the message from the Canadian government's
Department of Communications doesn't explicitly say so.
This information is taken from Bulletin 91-04 of the Terminal
Attachment Program Advisory Committee (TAPAC).
Technical specifications of these interfaces are given in the
following Bell Canada documents:
Interface Document ID-0008, March 1991: "Visual Message Waiting
Indication (VMWI) Terminal-to-Network Interface"
Interface Document ID-0009, March 1991: "Audible Message Waiting
Indication (AMWI) Terminal-to-Network Interface"
Specifications can be obtained from:
Bell Canada
Attn: Diane Morris
220 Laurier Avenue West, Room 1650
Ottawa, Ontario K1G 3J4
Telephone (613) 781-6816
Here is the rest of the TAPAC bulletin:
To: All DOC Terminal Equipment Certificate Holders, DOC Approved
Testing Facilities and Members of TAPAC
The purpose of this bulletin is to advise terminal provides of a
potential opportunity to generate new terminal business.
Disclosure Notice: The Terminal-to-Network Interface for Visual
Message Waiting Indication (VMWI)
Bell Canada has advised TAPAC that a Technology Trial is planned for
VMWI in the near future. This feature will be offered as an option to
residential and business subscribers. The preliminary Interface
Document describing the terminal-to-network interface used to VMWI is
available to all interested parties. The introduction of tariffed
services is planned for the last quarter of 1991.
In-band modem transmission of VMWI commands indicates the presence or
absence of voice messages in the subscriber's voice message mail box.
Information Notice: The Terminal-to-Network Interface for Audible
Message Waiting Information (AMWI).
Bell Canada is making available the existing AMWI signal specification
used in conjunction with Voice Messaging Systems. This feature,
previously limited to Centrex customers, will now be offered as an
option to residential and business subscribers. The Interface Document
describing the AMWI signal is available to all interested parties.
Tariffed service is planned for introduction in the last quarter 1991.
The AWMI signal is generated by periodic interruption of the standard
dial tine by the Central Office. This indicates to AMWI subscribers
that a message is present in their voice mail box.
Nigel Allen ndallen@contact.uucp