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| Products > Avaya > Modular Messaging > Message Application Server(s)
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| Message Application Server(s) |
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| One or more Message Application Servers are used to provide the following "front-end" IP Gateway functionality, including (but not limited to): |
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- Telephony ports.
- Switch integration (SWIN).
- Caller and subscriber touchtone user interfaces (TUIs).
- Two channels of Multilingual Text-to-Speech (TTS) - Additional TTS channels can be added for email on unified message stores.
- System Automated Attendant.
- Caller applications.
- Voice encoding and decoding.
- Fax receipt and send.
- Notification of new messages, via switch Message Waiting Indicator (MWI) and/or outcalling.
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| The maximum number of MASs supported by a single Voicemail Domain will depend on message store used (Avaya MSS, Microsoft Exchange, or IBM Lotus Domino). It will also depend on the integration type (analogue, QSIG, IP or Digital Set Emulation) and port card circuit density. A total of five MASs can be provisioned for the Avaya Message Storage Server and up to ten MASs can be used with the email message storage servers. |
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| Beyond capacity expansion, additional servers can also be used to enhance the overall availability and therefore provide additional system protection. For example, if a customer configuration consists of 32 Digital Set Emulation (DSE) ports, two Message Application Servers with two 8-port DSE port boards would be required. To increase availability and add further system protection, a third Message Application Server with up to 16 ports might be configured to effectively add 50% greater availability to the system and 100% port redundancy to any of the individual Message Application Servers. |
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| Designated an N+1 configuration, this type of configuration can be used to extend additional protection for hardware without necessarily providing full redundancy for all hardware elements. (Note that the Modular Messaging N+1 configuration is documented and supported for Modular Messaging integrations with Avaya Communication Manager. Other PBXs may be supported, please check your Switch Integration Configuration Notes for details and support availability). Disk storage redundancy is not required because the Message Application Server stores only transient data. A UPS with 30-minute holdover is required to be provided by the customer. Loss of power and power surges are the primary source of disk failures. By including a UPS, it is estimated that disk failures can be reduced by at least 50%. |
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| The Message Application Server is a Microsoft Windows 2003 Server provided by Avaya. Specifications for the Message Application Servers hardware are included in the Hardware Configurations section. For the email message storage servers, either the Avaya S3500 MAS hardware can be used or customers may provide the hardware based on Message Application Server specifications provided by Avaya. |
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