ZETRON 748, Техническое руководство

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Feature Set Reference
166 025-9368H
Five-Tone Signaling
The Five-tone formats are easier to use than the Two-tone format. The format for a Five-tone call
code is:
P12345X: P = Preamble (optional)
1-5 = Capcode (digits 0-9, G, B, C, D, R, F)
X = Second address (1=No address, 2=2nd address)
The Model 748 supports four Five-tone formats, EIA, CCIR, PZVEI and EEA. The tones and timing
are different for each; refer to “Five-Tone Group/Timing” in Section 7 for a list of the individual
tones and timings. Programming is the same for all capcodes regardless of format used.
Some pagers have battery-saving modes from which they need to be “awakened”. The pagers
“sleep” for some period of time and then wake up and look for a tone. If the tone is not present, the
pager goes to sleep again. If the tone is there, the pager stays alert and listens for signaling tones to
appear. The preamble is the “wake-up” tone and is always 690 milliseconds long followed by a 65
millisecond gap before the signaling tones. Once the preamble has been transmitted, all pagers will
be listening. The preamble is optional because not all systems require it, including mobiles equipped
with decoders.
The actual cap code is programmed using five digits, each represents one tone (in the Five-tone
format). Simply enter the call code or address of the mobile or pager. Normally with Five-tone, there
is a repeat tone that is used when the call code requires two or more digits in a row that are the same.
For example, the call code 13356 would send what appears to be four tones because the second and
third tones (33) are the same. To compensate for this, the repeat tone is used in place of the
duplicated digit. So, with a call code of 13356, and the EIA format, the following tones will be sent:
741 Hz, 1023 Hz, 459 Hz, 1305 Hz, 1446 Hz. If you are looking at the Five-tone Groups/Timing
table (see Section 7), you will notice that there is no way of entering the repeat tone. This is because
the Model 748 knows that the call code has repeating numbers in it and will substitute the repeat
tone automatically. For example, on a call code of 33333, the following tones will be sent by the
Model 748: 1023 Hz, 459 Hz, 1023 Hz, 459 Hz, 1023 Hz, but you only enter 33333 and the Model
748 will substitute the repeat tone.
You must however, notify the Model 748 of the “X” tone. You instruct it either not to call the
second address (1) or to call the second address (2). This is used for two address pagers, and when
the second address is specified, the “X” tone will be sent as a sixth tone. The Model 748 uses the
number of digits in the call code to determine whether or not a preamble is sent. If there are six
digits in the call code, it knows there is no preamble. Seven digits indicate that there is a preamble.
This is why you must always enter the last digit.
How to program it:
Access the Model 748 through your direct connected PC or terminal, or remotely from your PC
connected to a modem via the Model 748's internal modem.
Once connected to the Model 748 and the Main Menu is on the screen, type “1” and press ENTER ,
and the Interconnect Menu will appear. Type “3” and press
ENTER
, the User Menu will be
displayed using the currently selected user's data. Select the User number you wish to program (see
“User Range” later in this section). Select the item number for
Selcall capcode and press ENTER .