How MWI redundancy works
Voice Services sends an invalid MWI request through the SMDI line to the switch and expects an error. If connection is lost (no error returned), Voice Services queues the MWI requests until the link is restored. Once the link is restored, the MWI requests are sent.
 NoteOnly the most recent MWI request for each userID is sent to accurately reflect the state of the user's Mailbox.
Computer system requirements
Voice Services should run on a dedicated machine. This machine must meet the following minimum specifications. This machine will not be used in call processing and will only be used to set MWI.
NoteIf you prefer to run Voice Services on the same machine as your FirstClass server and/or Internet Services, these minimum specifications must be added to the system requirements of the other components. Minimum system requirements for the FirstClass server, Internet Services and the FirstClass client can be found in FirstClass Administrator's Guide Business Edition, or FirstClass Administrator's
Guide Education Edition.
• Windows NT Workstation 4.0 or Windows 2000
The machine should have a high-end graphics card and a network card installed.
This machine can be gatewayed to a FirstClass server running on a Mac OS.
• processor speed: 1 GB single processor
• 10 GB internal hard disk space
• 512 MB RAM per T1/E1 span
• FirstClass client installed on the Voice Services machine.
This must be from the same release as your server.
• COM port configured for the SMDI line.
Telephony hardware requirements
Installation and configuration
1 Configure the COM port in Windows as described below:
1 Open Ports from the Control Panel.
 COM1 and COM2 may be preconfigured in your machine.
2 Click Add to add the COM port for the Connected Systems PBXLink.
3 Choose the COM port you configured for the Connected Systems PBXLink.
4 Set Base I/O Port Address to the number you entered on your worksheet.
5 Set the IRQ to the number you entered on your worksheet.
6 Click OK to return to the Ports dialog box.
7 Click Settings and choose the options shown on the screen below:
8 Click Advanced.
9 Ensure:
• the COM port is correct (from the worksheet as above).
• The Base I/O Port Address and Interrupt Request Line (IRQ) are set to Default.
• FIFO Enabled is selected.
10 Click OK and exit, saving all changes.
2 Configure the Voice Services gateway as described here.
3 Install and run Voice Services by following the instructions in the following help documents:
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