GAI-Tronics CommandPLUS Series Desktop Console Installation and Service Manual - Manual (Page 49)

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Paging
Types of Paging
The CommandPLUS Series Desktop Console supports the following types of paging: DTMF, 2-Tone,
Plectron 5/6-Tone, 1500, and 2805. The CARD Suite software application is used to set the parameters
for these paging types.
N OTE : In many applications below 800 MHz, the maximum allowable signaling time, as prescribed by
FCC regulations, is 3 seconds and only signal once. Therefore, be sure that regulations applying to this
system are not violated before programming the tone length values that would cause the console to signal
for more than the allowed time.
It may be necessary to program the Page PTT (Push-to-Talk) function tone frequency and the pretime
value for these paging modes. If the Page PTT frequency for a particular channel is disabled, the
function tone used when paging (on that channel) will be the same tone used during a normal
transmission.
The PTT pretime compensates for delay in the system that may inadvertently cut off part of the paging
tones. The pretime value is the amount of time in ms before paging tones begin.
2-Tone Paging
The 2-Tone paging format requires a 3-digit prefix or capcode. This capcode and the selected code plan
determine what paging tone frequencies are transmitted. The console can be programmed to
automatically insert some or all of these digits.
Refer to the example provided below, and to Table 17 and Table 18 to assist you in determining the
capcodes you will need.
2-Tone Paging Example
Example 1
Suppose the number of 2-Tone keypad digits accepted from the user on the selected channel is 2, and
Code Plan R has been selected. The 8-second group call has been selected and the preset 2-Tone digit is
7. Also, the A tone length is set to 1 second and the B tone length is set to 3 seconds.
If the console operator entered the digits 43 and pressed the TRANSMIT button, the console would
generate 1251.4 Hz for 1 second followed by 669.9 Hz for 3 seconds. These tone frequencies are located
on Table 18 according to the following procedure.
1. Locate the chosen code plan (R in this example) on Table 17.
2. From the same chart, locate the most significant digit (MSD) of the 2-Tone prefix (7 in this
example).
3. Next, determine the 2-digit number that appears at the intersection of the code plan row and the MSD
column (62 in this example).