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Samsung Galaxy A5 Cradle with Push-to-Talk (PTT) AUX Speaker Mic
ESChat and Sonim XP8
Overview for D-Pad Devices
How to Make Calls on Push To Talk Plus Dispatch | Emergency Response Solutions | Verizon Business
PTT Overview
Zetron's Ray Mauro and EaseAlert's Blake Richardson showcase integration of Heart-Smart
RSP-Z2 Dual Channel Gateway: Standalone Applications
Sonim Technologies - Next generation mobile devices for emergency response.