What are Sprints Push-To-Talk services?
Sprint has two PTT services. The first is the Nextel DirectConnect network, which is the world’s largest PTT network. The second is Sprint’s QChat which is branded as Sprint DirectConnect to maintain consistency and reduce confusion. QChat uses an SIP stack plus additional hardware which rides over the 1xEVDO Rev. A data network to deliver sub one second connection times similar to Nextel DirectConnect, which uses a voice protocol built-in to iDEN.