Punjab Communications Ltd. Offers Avalanche Victim Detector in 457 KHz Frequency. Punjab Communications Ltd. Has received ISO 9001:2008 certifications. Punjab Communications Ltd. Supplies telecom and IT equipment. Avalanche Victim Detector in 457 KHz Frequency can be used either as transmitter or receiver. Avalanche Victim Detector in 457 KHz Frequency is used for rapid location and rescue of persons buried under snow avalanches. It is widely used by defense and other security agencies as a rescue device.