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Top message:  PTT facts for Big Orange by hot_md_guy   Aug 21, 2005, 3:23 PM

Replying to:  Re: PTT facts for Big Orange by hot_md_guy   Aug 21, 2005, 10:41 PM

Re: PTT facts for Big Orange

by nextel18    Aug 21, 2005, 11:38 PM

also, cingular wont beat out nextel with this just like sprint and verizon didnt have any effect. kodiak, on its on is a pretty good solution, but when it will be over gsm or gprs using voip it will be bad.


everyone knows that nextel's ptt is instant.

i am going to say this just like i said about verizon's and sprint's push to talk, that cingular's push to talk will not get many subscribers and will fail against nextel.

------ ... »

"Should the two carriers decide to push ahead with the technology, they might be tempted to try Kodiak, if only because it may solve some of the delay problems that have analysts complaining. Kodiak's technology is not as fast as Nextel's--it takes about 3 seconds to set up a call--but to people who have never tried a Nextel phone, it may well be good enough. In a report about Alltel's Touch2Talk service, which is provided by Kodiak, Yankee Group analyst Adam Guy writes, "While call setup latency averaged about 2 seconds, the intra-call latency was almost nonexistent. The setup is an improvement over Push to Talk and Ready Link." Verizon declined to comment on whether it would consider adopting Kodiak's technology, while Sprint said it is always looking for ways to improve its service. "


fyi, alltel and cingular will use the same technology with kodiak. so it will be the same speeds.

-------- ... »

"Instant Call Set-up – Subscribers can set-up any communications session in 2 - 3 seconds. Kodiak
requires only the originator to be a subscriber to the Kodiak Voice Bridge. Other wireless phones can
receive Kodiak Voice Bridge calls."

------------- ... »

January 2005

"U.S. operator Nextel has demonstrated a successful business case by
offering bundles of regular voice and push-to-talk (PTT) services to its
customers. Because Nextel’s PTT is based on Motorola’s proprietary iDEN
technology, traditional GSM and CDMA mobile operators have not been
able to take advantage of such features until the recent implementation of
next-generation PTT technology: push-to-talk over cellular (PoC)."

---------------- ... »

Low Latency (“Chirp to Voice”)
Kodiak’s RTX System sets a new benchmark for short intra-call voice latency — only 150 milliseconds,
compared to between 2.5 seconds to 3 seconds for competing P2T technologies.

Call Set-up Speed (“Time to Chirp”)
The Kodiak RTX System accomplishes call setup, a one-time occurrence for each instant voice call, in 2-3
seconds. In contrast, for call setup in the field, VoIP systems on GPRS networks require 4-5 seconds and VoIP
systems on CDMA networks require 8-10 seconds.


(page 4)
Gprs is horrible. lacks of QoS. 8-10 seconds in the field with set up time. voice latency 3.5-4.5 seconds hard to understand quality voice. and less then adequate voice network.

kodiak solution on its on is very good, but as mentioned before when it goes onto gsm or cdma its terrible.

good luck... but i stand by my statement.

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