QChat

QChat is a Push-to-Talk (PTT) technology developed by Qualcomm.
The QChat software application was developed by Qualcomm Internet Services (QIS) a division of Qualcomm and part of the Qualcomm Wireless and Internet group. QIS offers a set of software products and content enablement services to support and accelerate the growth of the wireless data market.
QChat uses standard Voice over Internet Protocol (VoIP) technologies. VoIP is a voice delivery mechanism that uses the Internet Protocol to manage the delivery of voice information. Voice information is sent in digital form over IP-based data networks (including CDMA) in discrete packets rather than traditional circuit-switched protocols such those used in the public switched telephone network (PSTN).
How Does QChat Work?
QChat users on 3G wireless devices can connect to each other worldwide, in either private or group calls, with the push of a button. QChat uses Voice over Internet Protocol (VoIP) technologies to allow subscribers to communicate by using a PTT button on the handset instead of making a standard cellular call.
QChat calls are created by combining separate point-to-point connections between each IP endpoint; the process is managed by the QChat Applications Server, which is deployed on the carrier’s IP-based Wide Area Network (WAN).
To initiate a call, a user presses the PTT button and receives an immediate indication of whether the call recipient is available. If he or she is, the caller can begin speaking immediately. If the recipient is unavailable, the caller will simply hear a negative response tone instead of a busy signal or voicemail.
Sprint's phones supporting QChat technology were released starting in April 2008, with a trial of business customers in Kansas and Colorado. Sprint then announced that the Nextel Direct Connect devices powered by QChat were available in more than 40 markets in June 2008.
Supported models include :
*Sanyo Pro 200 (Discontinued)
*Sanyo Pro 700 (Discontinued)
*LG LX400 (Discontinued)
*Motorola V950 (Discontinued)
*Samsung Z400 (Discontinued)
*Samsung Z700 (Discontinued)

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