Specifications

82 | Personal Security Data Book
Communication specification
The parameters entered under the Communication
specification sub-menu define how a call to or from an
external device is handled on the RS 232 data lines.
Using standard menu driven procedures a single protocol
can be structured from a choice of pre-defined
procedures known as building blocks. Each building
block has its own unique function within the protocol.
Message specification
The parameters entered under the Message specification
sub-menu define the address,bleep pattern and display
information within the protocol.
Message Conversions
The parameters set under the Message conversion menu
enables call data from an external RS 232 device to be
converted in to paging system data needed when calling a
paging receiver.
The alphadesk requires an address, a bleep code as well as
alpha and/or numeric information before it can call a
paging receiver. The alphadesk has the following options
in order to receive call string data for an RS 232 call:
1. Receive the complete address, bleep code and
information from the external device.
2. Receive part of the data string from the external
device and adds the fixed system digits.
3. All calls from an external device go to the same pre-
programmed address with different data information
strings.
4. Information received from the external device is
converted in to the paging call.
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9498 973 13913 01-1 | Printed in The Netherlands | Januari 2004 • Data subject to change without notice
Once a protocol has been structured, the protocol can be
saved to disk and edited as and when required. A filename
is required if the protocol is to be stored on disk. This
takes the form of a standard DOS file name with an
extension .232. This extension is added automatically and
allows the editor to identify the file as a protocol
description.
In addition to the file name a description can be added to
the protocol to give a clear meaning of the file.
Requirements
The recommended minimum hardware and software is a
basic Alphadesk LBB 6000/50.
REMARKS
1. Special RS 232 cards are required if more than two
external devices are to be supported by a single
standard PC.
2. Any special cards used must have a shared interrupt as
only one interrupt line is used for all COM ports and
it must be shared with the alphadesk interrupt.