The relative infrequency of SWAT call-outs means these expensively-trained and equipped officers cannot be left to sit around, waiting for an emergency. In many departments the officers are normally deployed to regular duties, but are available for SWAT calls via pagers, mobile phones or radio transceivers. Even in the larger police agencies, such as the Los Angeles PD, SWAT personnel would normally be seen in crime suppression roles—specialized and more dangerous than regular patrol, perhaps, but the officers wouldn't be carrying their distinctive armor and weapons.