Abstract: The method provides for separable subchannels sharing a communication channel. A processor receives input of a user setting a transmitter device to a first of at least two subchannels of a communication channel in which the first subchannel comprises a first portion of a bandwidth of the communication channel. The processor receives an audio signal as input to the transmitter device. The processor converts a time-series waveform of the audio signal into a frequency-series waveform. The processor determines that the transmitter device is set to the first subchannel. In response to determining the device is set to the first channel, the processor filters the frequency-series waveform through a series of steep shoulder digital bandpass filters set to transmit through the first portion of the bandwidth, and the processor transmits the audio signal as the filtered frequency-series waveform.

Abstract: Links between multiple points are monitored. A determination is made that there is a change in power on a link being monitored. Based on determining that there is the change in the power on the link, latency on the link is checked and an anomaly on the link is detected. Based on detecting that there is the anomaly on the link, a determination is made of a type of the anomaly based on whether the checking indicates there is a latency change in the latency of the link.

Abstract: A method, system and computer program product for verifying a communication channel (e.g., radio channel) being open and usable. A query of one or more dual-tone multi-frequency signals (DTMF signals) is transmitted by a transmitting device (e.g., handheld radio device), such as a transmitting device operated by a first responder, over a communication channel (e.g., radio channel) to a receiving device (e.g., handheld radio device), such as a receiving device operated by a different first responder. Such first responders utilize a “voice grade” channel (frequency range of 300 to 3,000 Hz) to communicate, which is used by the transmitting device to transmit the query of one or more DTMF signals. An acknowledgement of a reception of the query of one or more DTMF signals from the receiving device is received by the transmitting device thereby verifying that the communication channel (e.g., radio channel) is open and usable.

Abstract: The method provides for separable subchannels sharing a communication channel. A processor receives input of a user setting a transmitter device to a first of at least two subchannels of a communication channel in which the first subchannel comprises a first portion of a bandwidth of the communication channel. The processor receives an audio signal as input to the transmitter device. The processor converts a time-series waveform of the audio signal into a frequency-series waveform. The processor determines that the transmitter device is set to the first subchannel. In response to determining the device is set to the first channel, the processor filters the frequency-series waveform through a series of steep shoulder digital bandpass filters set to transmit through the first portion of the bandwidth, and the processor transmits the audio signal as the filtered frequency-series waveform.