|Source:||MSExchange Unified Messaging|
|Message:||The IP gateway or IP-PBX “%1” did not respond to a SIP OPTIONS request from the Unified Messaging server. The error code that was returned is “%2” and the error text is “%3”.|
This Warning event indicates that the expected Session Initiation Protocol (SIP) options response status code 200 was not received by the computer that has the Unified Messaging server role installed. The response status code 200 is expected after the Unified Messaging (UM) server issues an SIP Option request to the SIP peers (VoIP gateway or IP-PBX). The SIP request is sent periodically as a mechanism to obtain the operational status of the SIP peers. After the UM server issues the request, the UM server waits for an SIP options response. If the UM server receives a response status code 200 within 2 seconds, the SIP peers are considered functional and without a connection delay between the server and the SIP peers. This event may be caused by one or more of the following:
For more information about UM IP/VoIP gateways, see Understanding Unified Messaging IP Gateways.
For more information about UM Test Phone, see Testing a UM Server with the UM Test Phone.
To resolve this warning, do one or more of the following:
If you are not already doing so, consider running the tools that Microsoft Exchange offers to help administrators analyze and troubleshoot their Exchange environment. These tools can help you make sure that your configuration is in line with Microsoft best practices. They can also help you identify and resolve performance issues, improve mail flow, and better manage disaster recovery scenarios. Go to the Toolbox node of the Exchange Management Console to run these tools now. For more information about these tools, see Toolbox in the Exchange Server 2007 Help.