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RTU-292 Operations Manual
While the operator is using the keypad to control the RTU-292, the unit will not be available
for:
• PSTN Auto Answering.
• Radio Squelch Break Access Operation.
• Radio DTMF Access Operation.
• Local Phone Control.
Table 7-9 DTMF Radio Control Commands
These commands are intended to control a Motorola URC-200 radio associated with the
RTU-292. The Radio Control Option must be enabled (See Table 1-2).
Command Followed By Command Description
* 0 [0..9] Channel (preset) select
* 1 [nnnnn] Frequency Select (both receive and transmit)
* 2 [nnnnn] Transmit frequency select
* 3 [0..1] Scan mode (0 = scan stop, 1 = scan start)
* 4 Reserved for future use
* 5 [000..255] Squelch select
* 6 [0..1] Text mode select (0 = plain text, 1 = cipher text)
* 7 [0..1] Modulation select (0 = AM, 1 = FM)
* 8 [0..2] Power level select (0 = low, 1 = med, 2 = high)
* 9 9 Saves the current radio channel (preset) data.
* # Leave Radio Command Mode (may be entered at any time).
With all of the above commands (except *3, *99, and *#), the user may substitute the DTMF
"#" character in place of the “Followed By” data to query the radio for its current setting.
For example, if the sequence "* 0 1" is entered, the RTU-292 will command to the radio to
select channel 1. However if the sequence "* 0 #" is entered, the RTU-292 will play back
the current channel number. (The Voice Prompt Option is required to take advantage of this
playback feature.)
JPS Communications, Inc.
7-16