3.7.1.3 Waiting For Input (QUERY)
When the RTU-292 needs user input it will play 1 short low-pitched tone followed by 1 short high pitched tone. A QUERY is played whenever the user needs to enter some data such as a password or telephone number.
3.7.1.4 Radio Is Keyed (KEYED)
When the RTU-292 wants to signal that the user has keyed the radio it will play 1 short high- pitched tone. The RTU-292 will play KEYED whenever the user has manually keyed the radio by entering the correct telephone command.
3.7.1.5 Radio Is Unkeyed (UNKEYED)
When the RTU-292 wants to signal that the user has unkeyed the radio it will play 1 short low- pitched tone. The RTU-292 will play UNKEYED whenever the user has manually unkeyed the radio by entering the UNKEY telephone command.
3.7.1.6Disconnecting (DISCONNECT)
When the RTU-292 wants to signal that it is dropping the radio communications link (and hanging up the phone) it will play 3 short high-pitched tones. The RTU-292 may disconnect for a number of reasons:
1.Any time the user enters a * (star) followed by a # (pound sign).
2.Whenever Busy Tones or Reorder tones are heard on the phone line. The DSP algorithms are always searching for call progress activity on the phone line.
3.The unit will also disconnect if there is a lack of any activity on the phone line for a time longer that that set by the Inactivity Timer (see Table 3-1). If the unit signals that it is dropping the link due to a lack of activity, either party may prevent the disconnection by speaking within five seconds.
4.Whenever “Line Reversal” (Reverse Battery Signaling) is detected on the phone line.
3.7.2 VOICE PROMPTS
If the RTU-292 is equipped with the Voice Prompt Option it will prompt the user for input and signal its current status to the user status by playing pre-recorded messages, called voice prompts. Tone prompts are played before each voice prompt. For example, if the RTU-292 wanted the user to enter the password it would play the QUERY tone sequence followed by the voice prompt “Enter Password”. The number of different tone prompts is limited because the average user cannot be expected to remember more than a few. However, since voice prompts are largely self-explanatory the RTU-292 has more than 30 different voice prompts. The remainder of this section includes a description of the voice prompts that the unit provides at appropriate times during unit operation. These prompts are only heard if the Voice Prompt Option is installed.
3.7.3CALLING THE RTU-292 VIA THE OUTSIDE LINE
If the RTU-292 is set for Automatic Answer (AUTO ANSWER LED lit) it will answer an outside call after 2 rings. Once the unit answers the phone, the caller controls the unit by sending commands via the keypad of a DTMF telephone. Rotary-style telephones cannot be used to control the RTU-292.
