The WS-Enumeration specification defines the MaxTime value to indicate that the clients receive a response or a fault for Pull responses within the specified time, as specified in [WSENUM] section 3.2.

Web Services Management Protocol Extensions for Windows Server 2003 servers MUST set the default time-out value of Pull responses to the MaxTime value, if no wsman:OperationTimeout is specified in the client request. However, if neither this value, nor wsman:OperationTimeout is specified by the client, or if the MaxTime value is more than the MaxTimeoutms value, as specified in section, then the server MUST use the MaxTimeoutms value for the Pull response time-out.