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Avaya Modular Messaging Concepts and Planning Guide
8-4 November 2004
Avaya Modular Messaging Concepts and
Planning Guide
of H.323 trunk groups configured as tie trunks supporting Q-Signaling
(QSIG) features. QSIG is a standards-based, private networking protocol,
based on Q.931 standards (ISDN). Signaling information and MWI
information are transmitted using QSIG messages embedded in an H.323
packet.
Note: H.323-based IP integration currently does not support fax
capabilities.
QSIG D Channel ISDN protocols, such as QSIG, carry signaling information in the D
channel for calls where voice data is carried in separate but associated
bearer channels. This is referred to as Common Channel Signaling (CCS).
The data in this channel can be used for integration.
For QSIG integration, Modular Messaging supports 23-port T1 port
boards and 30-port E1 port boards.
The Avaya switches that Modular Messaging supports with T1 and E1
QSIG integration are Avaya Communication Manager (release 1.1 or
later) and Avaya DEFINITY (release 10 or later).
Digital Set
Emulation
Many switch vendors use proprietary digital protocols to connect their
own hand sets to the switch. These protocols provide call control and
integration information. Examples of such switches include Nortel
Meridian and Siemens.
Inband DTMF
integration
With inband integration, the switch sends DTMF tone strings to the MAS
port when the call is first placed to the port. These DTMF tone strings are
sent within the voice channel, and not on a separate data channel, thus the
name ‘inband’ integration. MAS units are configured to recognize the
format of these tone strings and interpret the information.
RS-232 serial
integration
With RS-232 serial integration, a separate RS-232 serial communications
interface is used to send control information between the switch and the
MAS. Avaya Modular Messaging supports a number of RS-232 serial
integration protocols to send data to the MAS. The most widely used
protocol is the standard Simplified Message Desk Interface (SMDI)
protocol. In other cases, the RS-232 interface is proprietary to a particular
switch.
Note: Some switches can support only a single serial interface for
one hunt group. MAS units, when used in a multiserver voice
mail domain, can operate with a single serial interface. This
is known as remote integration.