Developer's DescriptionBy Verizon Consumer GroupPush to Talk Responder (MC-PTT) over LTE is a 3GPP standards based interoperable push-to-talk solution targeted to support public safety users...Push to Talk Responder (MC-PTT) over LTE is a 3GPP standards based interoperable push-to-talk solution targeted to support public safety users communication needs. It provides advanced functionality intended to enhance the experience and capability of public safety users to manage emergency situations beyond simple push-to-talk communications