Talk over a response to check for the ability to stop a prompt playback, because callers won't be careful about working around system limitations. Test response times when a system is loaded with a complete list of names. Make sure the system you select is easy to maintain. Look for expandability to meet future needs. In fact, you can find speech recognition is used in several ways today, including dictation, computer control and telephone response.
Speech recognition requires either discrete or continuous speech.
Discrete speech consists of words spoken with distinct pauses between each word. Continuous speech is the way people normally talk. Desktop speech recognition has been around since the early 1980s, but as discrete recognition, in which the software was trained to recognize a few carefully spoken single words or sounds. A problem facing both continuous and discrete recognition is vocabulary size. To be useful for dictation, a recognition system must be able to handle several thousand words.