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Can you manually dial the MWI number on any phone and turn on and off the indicator?
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Can you manually dial the MWI number on any phone and turn on and off the indicator?

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What messaging system are you using?
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Here at the office all of the VOIP's are not receiving Voice Mail alert indicators or messages. &nbsp;When trying to access the Voice Mail System from the handset I receive a message stating &quot;Messaging Service is Unavailable&quot;<br />
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I am using Cisco Unified Call Manager 4.2 on a Windows 2000 Server OS.<br />
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I have tried bouncing IIS and the Call Manager Service pertaining to messaging with no improvement to my issue.<br />
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Any help is appreciated.
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Here at the office all of the VOIP's are not receiving Voice Mail alert indicators or messages.  When trying to access the Voice Mail System from the handset I receive a message stating "Messaging Service is Unavailable"

I am using Cisco Unified Call Manager 4.2 on a Windows 2000 Server OS.

I have tried bouncing IIS and the Call Manager Service pertaining to messaging with no improvement to my issue.

Any help is appreciated.

Cisco Unified Call Manager 4.2 Messaging Unavailable

IP telephony (Internet Protocol telephony) is a general term for the technologies that use the Internet Protocol's packet-switched connections to exchange voice, fax, and other forms of information that have traditionally been carried over the dedicated circuit-switched connections of the public switched telephone network (PSTN). Using the Internet, calls travel as packets of data on shared lines, avoiding the tolls of the PSTN. The challenge in IP telephony is to deliver the voice, fax, or video packets in a dependable flow to the user.