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This section contains descriptions of and comments about devices commonly found on wide area networks. Table 2.11 includes the following information on WAN interconnects:

The next parameter wants the current time. This is based on UTC (unless you ve changed the device s time zone) and is in a 24-hour format. For example, 3 P.M. would be 15:00:00. Again, use context-sensitive help to figure out if more parameters are required:

lasses and objects are two of C++ s most important features. This chapter examines them and related issues in detail.

In some cases, nesting the conditions will still not give you the desired results. This often happens when you want to test for multiple values against the same dimension object. For example, let s say you are looking for customers who bought two products together: a plasma TV, for example, along with a TV stand (or is everyone nowadays mounting them to the wall ). If you use the In List operator, you will get a list of customers who buy either a TV or a TV stand. If you create two conditions and join them with AND, you will get no rows returned, as the conditions in the WHERE clause are mutually exclusive. To retrieve the desired results, you need to create two queries within one data provider, leveraging the RDBMS s set operators: UNION, INTERSECT, and MINUS. Table 23-1 explains the different operators and their purposes. In order to use these operators, the number of result columns and the data type for each of the columns must be the same. Often when using INTERSECT, the result objects are exactly the same and only the conditions change between the two queries. 8 discussed some of the problems with queries that contain loops; INTERSECT is a better alternative to answer a query that otherwise would contain a loop. For UNION and MINUS, you may want to change the measure column. It s possible to do this, but in the report, Web Intelligence will use the variable name from the first query. MINUS is also useful for determining if there are data quality issues between a fact table and dimension table, rather than using an outer join (see 8). For example, if you want a list of products for which there are no corresponding sales transactions, the main query would contain products from the dimension table and the minus query would

p False True False True q False False True True p&q False False False True p|q False True True True p^q False True True False !p True False True False

b = wT1 ,

On an employee stock purchase plan one share of stock is purchased each month for 10 months. The share prices start at $10 at the end of the first month and decrease by $1 per month thereafter for the duration of the offer. This is an incentive (to stay with the company) plan and it does not reflect the actual stock price.

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do { i = ob2.run(); cout << i << " "; } while(i > CounterNameSpace::lowerbound); return 0; }

As you can see in Figure 4-13, such a situation can lead to a rather cumbersome signaling exchange if the gatekeeper of the called endpoint wants to handle call signaling. Things do not need to be so complex, however. Given that the two endpoints in our examples are controlled by different gatekeepers, it is very possible that the gatekeeper of the calling endpoint does not know the call-signaling address of the endpoint to be called. It may have only an alias for that endpoint, in which case it will have to issue an LRQ to the gatekeeper of the endpoint to be called, perhaps by multicast, in order to determine the call-signaling address of the endpoint. If the gatekeeper of the terminating endpoint does not want to handle call signaling, then it will return the call-signaling address of the endpoint in the LCF. At that point, the call will proceed largely according to the example of Figure 4-12. On the other hand, if the gatekeeper wants to handle call signaling, it will return its own call-signaling address in the LRQ. In such an event, the sequence of events would be as depicted in Figure 4-14. Again, the Alerting message and the RAS Disengage sequence are not shown. As you can see, the call establishment from the beginning is in accordance with the desires of the remote gatekeeper. Therefore, the call establishment is much simpler and call redirection using the Facility message is not needed.

Let s begin with an example: