CHAPTER 30

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1. In automatic paging systems, there is no need for an operator at the paging terminal interface. A user can dial into the paging terminal's computer and speak the paging message and the pager number. The automatic speech recognition software will convert the spoken message into text format and then send the message. However, with the present state-of-the-art, speech recognition accuracy is not very high. An alternative mechanism for automatic paging is to use a computer to send text directly to the paging terminal. The paging terminal can be Web-enabled. Any user can access the terminal's computer over the Internet and submit a message for paging.

2. Each message is of 30 seconds duration. Voice coding is done at 5.3kbps. To store 10 messages, the storage requirement is 300 seconds × 5.3 kbps = 1590kbps = 198.8KBytes.

3. For a voice paging system that uses 2.4kbps voice coding, the memory requirement on a voice pager that has to store 20 messages each of 30 seconds duration is 20 × 30 × 2.4 Kbits = 6 × 240 Kbits = 1440 Kbits = 180 KBytes.

4. You can obtain the POCSAG decoder software from http://www.foni.net or http://www.qsl.net.

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