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RTU-292 Operations Manual
7.3.2 LOCAL PHONE OPTION OPERATION
When the handset of the local phone is picked up, a special dial tone, generated by the RTU-
292, will be heard in its receiver. The user then has three options:
Table 7-5 Local Phone DTMF Commands
DTMF Command Function
0 Place a call to the RTU-292 Operator
1 Connect radio audio to the local phone
9 Place telephone calls to the outside PSTN line
Once the local phone user has selected a function and entered the associated DTMF character,
he may use any of the keypad commands that are available to a PSTN caller in the command
mode (see Table 3-1). It is important to note that the local phone audio into the RTU-292 does
not run through the unit's DSP circuitry and therefore cannot activate the VOX function.
Always de-activate the VOX function and use the manual key/unkey commands when
communicating over a radio via the local phone (see telephone commands in 3.7.3.4).
Figure 7-2 Local Phone Option Installation
JPS Communications, Inc.
7-5