OMA Standard
Interworking between IMPTTP and PoC
IMPTTP can interwork with PoC network.
![](images/rtsp-poc.png)
PoC 2.1
Currently PTT standard is only PoC(Push to talk Over Cellular) of OMA. Unfortunately because PoC has targeted to Cellular, it is based on IMS(IP Multimedia Subsystem).
References :
https://technical.openmobilealliance.org/Technical/technical-information/release-program/current-releases/poc-v2-1
![](images/poc21.png)
Interworking with PoC
PoC has an interworking standard to interwork with another P2T network.
IMPTTP
IMPTTP(IMPTT's Protocol) is a IP-PTT protocol.