Cobham Wireless’ range of DSP (digital signal processing) 900MHz digital off air repeaters provide cellular coverage in small, medium, large and campus style buildings inside tunnels and metros and into remote or rural communities. The product range supports multiple wireless technologies operating in the 900MHz band including GSM, EGSM, CDMA, WCDMA and LTE making frequency “re-farming” simple and effective to do without the need for any costly hardware changes. Devices are easily configured either locally or remotely via a simple GUI web interface or using the AEM network management software and incorporate an innovative IMOP (Interference Mitigation Oscillation Prevention) mechanism that ensures that the products will never oscillate something that can happen with other repeater systems. The 900MHz portfolio includes low, medium and high power products which can be used inside or outside buildings. A unique feature of our product design is that cooling fans are not used in externally based products thus increasing MTBF and resilience.