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Motorola Announces Next-Gen PTT Technology for EVDO Rev. A

Article Comments  18  

Aug 22, 2008, 10:34 AM   by Eric M. Zeman
updated Aug 22, 2008, 11:23 AM

Today Motorola announced its next-generation push-to-talk technology that works with CDMA EVDO Rev. A networks, rather than iDEN. The PTT over cellular, or PoC, system uses a special piece of software on the phone to make PTT calls work via Rev. A networks. It provides functionality similar to its iDEN-based PTT technology, and lets users communicate walkie-talkie style with the push of a button, though the underlying technology is different. The technology also supports other push-to-X services. Motorola's PoC will compete with Qualcomm's QChat service, which does the same thing on Rev. A networks. Motorola's PoC is the technology that Verizon has chosen to power its PTT services.



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Aug 22, 2008, 3:40 PM

The Problem With PTT Over Cellular

Is that it relies on the telephone company's switched network system, rather than being a true walkie-talkie SMR based technology.

Since this system relies on the phone line, it won't work if the lines are all busy or down, which happens sometimes. There's also the problem with bandwidth and voice channel availability. iDEN uses only a half-duplex voice channel and very little bandwidth to make calls while POC uses an entire voice channel and is a major bandwidth hog to boot.

What all of this means is if you are operating a business with 500+ employees who will be making frequent PTT calls, the nearby tower will get overloaded VERY quickly with voice and data traffic.

There's a reason that it's called "Direct Connect." Direct Connec...
I remember iDEN PTT having the audio quality of an AM broadcast, with all of us frequently repeating "Say again" or just calling up the person to talk to them. While iDEN sipped bandwidth like the way a Toyota Prius sips fuel, it came at the cost of v...
The only thing destined to fail is iDEN!
Riddle me this- If Sprint thought this was a liable source of future income why would they be shoping iDEN(Nextel) on the open market? At best the iden network turns into an mvno based for walkie talkie servic...
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