Nortel Networks RTU-292 Speaker Buttons, Auto ANS Button, Audible Ring Button, KEY Pushbutton

RTU-292 Operations Manual

3.2.11 SPEAKER BUTTONS

These two buttons, SPEAKER/PHONE and SPEAKER/RADIO, determine whether the speaker monitors telephone receive audio, radio receive audio, or both. Note that if a radio-to- telephone call is underway and both buttons are pressed, the full conversation is being monitored. There is an LED alongside each button that is illuminated when the associated path is selected.

3.2.12 TEL VOX

This button enables keying of the radio transmitter by the RTU-292 VOX (Voice Operated Xmit) facility. When the VOX is selected (associated LED ON), the VOX is active, and the key relay is energized when the VOX circuitry detects a signal from the telephone line. The VOX PTT output has a “hang” time to keep it from dropping out during short pauses in speech. The hang time duration is the length of time that the PTT signal will remain active following the loss of detection of signal. (The hang time is internally adjustable; see section 2.8). If the TEL LINE/RADIO LED continues to flash for more than ten seconds after the TEL LINE/RADIO pushbutton has been pressed to make a connection, the unit has not adapted properly and VOX operation will not be possible.

3.2.13 AUTO ANS BUTTON

This pushbutton may be used to manually enable (LED ON), or disable (LED OFF), the Auto Answer feature. When enabled, the RTU-292 is in the Automated Operation Mode and the unit will automatically answer the phone after 2 rings. See section 3.7 for a description of the Automatic Operation capabilities of the RTU-292.

3.2.14 AUDIBLE RING BUTTON

This button determines if the ring from an incoming telephone call will be heard via the RTU- 292’s speaker. When the Audible Ring mode is enabled, the ring signal will be audible in the speaker. The ring volume is independent of the SPEAKER VOLUME setting, and is set internally by adjustment R156. Regardless of the position of the AUDIBLE RING button, the LED indicator associated with the TEL LINE/PHONE button flashes on an incoming ring, so that a visual indication of the ring signal (incoming call) is always provided.

3.2.15 KEY PUSHBUTTON

This pushbutton operates the key function of the RTU-292, sending a key command to the associated transmitter. This button is functional at all times. The red KEYED LED next to the KEY pushbutton is lit whenever a key command is sent to the transmitter from any source within the RTU-292 (handset keyswitch, or TEL VOX, for example), not just from the KEY pushbutton.

3.2.16 PEAK LED

This red LED flashes on audio peaks that are detected in the audio incoming from the receiver to indicate the proper adjustment of the internal RX LEVEL control (R116). The input level is correct when the PEAK LED flashes occasionally on incoming receiver speech peaks. If the LED flashes continuously, the input level is too high and should be reduced (see paragraph 2.10). Note that this LED does not respond to telephone audio.

3-3 JPS Communications, Inc.