New VOIP App Claims Works with as Little as 8 kbps - for Tmobile Roaming?
Aug 19, 2015, 9:38 pm
#1
Original Poster
Join Date: Jul 2000
Posts: 3,746
New VOIP App Claims Works with as Little as 8 kbps - for Tmobile Roaming?
I just came across this new VOIP app - Zipt. http://www.zipt.com.au/ The website claims that it works with as little as 8 kbps, and emphasizes that it works over 2G connections.
It's not clear to me whether the 8 kbps only applies to peer to peer or to premium calls routed to regular phone numbers. I assume it is easier to keep low bandwidth if you control both endpoints, but the usage for PSTN calls might be less than other apps.
It seems very much a beta - one tab of the website says that it is in beta and public release is in first half of 2015, and another tab has a link to the Play store to download the app (no IOS version yet.)
If it works as claimed, this would be ideal for folks on the free throttled T-mobile roaming.
It's not clear to me whether the 8 kbps only applies to peer to peer or to premium calls routed to regular phone numbers. I assume it is easier to keep low bandwidth if you control both endpoints, but the usage for PSTN calls might be less than other apps.
It seems very much a beta - one tab of the website says that it is in beta and public release is in first half of 2015, and another tab has a link to the Play store to download the app (no IOS version yet.)
If it works as claimed, this would be ideal for folks on the free throttled T-mobile roaming.
Aug 20, 2015, 6:51 pm
#2
Join Date: Sep 2010
Programs: United Airlines MileagePlus
Posts: 44
I just came across this new VOIP app - Zipt. http://www.zipt.com.au/ The website claims that it works with as little as 8 kbps, and emphasizes that it works over 2G connections.
It's not clear to me whether the 8 kbps only applies to peer to peer or to premium calls routed to regular phone numbers. I assume it is easier to keep low bandwidth if you control both endpoints, but the usage for PSTN calls might be less than other apps.
It seems very much a beta - one tab of the website says that it is in beta and public release is in first half of 2015, and another tab has a link to the Play store to download the app (no IOS version yet.)
If it works as claimed, this would be ideal for folks on the free throttled T-mobile roaming.
It's not clear to me whether the 8 kbps only applies to peer to peer or to premium calls routed to regular phone numbers. I assume it is easier to keep low bandwidth if you control both endpoints, but the usage for PSTN calls might be less than other apps.
It seems very much a beta - one tab of the website says that it is in beta and public release is in first half of 2015, and another tab has a link to the Play store to download the app (no IOS version yet.)
If it works as claimed, this would be ideal for folks on the free throttled T-mobile roaming.
High latency may make any VoIP calls unbearable.
Aug 20, 2015, 6:54 pm
#3
Original Poster
Join Date: Jul 2000
Posts: 3,746
True, the latency can be worse than the bandwidth.
Routing data through the home country seems to be the standard, at least based on my experience with various European prepaid SIMs. The data always goes through the home country, so you always pull up the Google page variant for the SIMs home country when you type in google.com.
Routing data through the home country seems to be the standard, at least based on my experience with various European prepaid SIMs. The data always goes through the home country, so you always pull up the Google page variant for the SIMs home country when you type in google.com.
Aug 20, 2015, 8:12 pm
#5
Original Poster
Join Date: Jul 2000
Posts: 3,746
That would likely apply to calls to calls to non-subscribers over the PSTN, if the only gateway to the PSTN was off in Australia.
However, calls to other users of the app might be peer to peer.
On the other hand, you would think if they had some great new compression codec which is better than everyone else there would be some press about it (come to think of it, didn't the first year of HBO's Silicon Valley involve a compression algorithm?).
However, calls to other users of the app might be peer to peer.
On the other hand, you would think if they had some great new compression codec which is better than everyone else there would be some press about it (come to think of it, didn't the first year of HBO's Silicon Valley involve a compression algorithm?).
Aug 21, 2015, 8:09 am
#6
Join Date: Jun 2012
Posts: 3,381
GSM (first digital coding) voice bitrate is 13kbit/s
https://en.wikipedia.org/wiki/Full_Rate
AMR can be done at 7.4kbps, down to 4.75kbps (on the mobile side, we are trying to move to AMR-WB 12-24kbps)
https://en.wikipedia.org/wiki/Adapti...te_audio_codec
i'm sure 8kbit/s is doable especially with newer codecs/technology... on quality, who knows?
https://en.wikipedia.org/wiki/Full_Rate
AMR can be done at 7.4kbps, down to 4.75kbps (on the mobile side, we are trying to move to AMR-WB 12-24kbps)
https://en.wikipedia.org/wiki/Adapti...te_audio_codec
i'm sure 8kbit/s is doable especially with newer codecs/technology... on quality, who knows?
Aug 22, 2015, 8:37 am
#7
Join Date: Nov 2006
Location: Detroit; Formerly Dubai
Posts: 3,652
Is AMR or G729 better?
GSM (first digital coding) voice bitrate is 13kbit/s
https://en.wikipedia.org/wiki/Full_Rate
AMR can be done at 7.4kbps, down to 4.75kbps (on the mobile side, we are trying to move to AMR-WB 12-24kbps)
https://en.wikipedia.org/wiki/Adapti...te_audio_codec
i'm sure 8kbit/s is doable especially with newer codecs/technology... on quality, who knows?
https://en.wikipedia.org/wiki/Full_Rate
AMR can be done at 7.4kbps, down to 4.75kbps (on the mobile side, we are trying to move to AMR-WB 12-24kbps)
https://en.wikipedia.org/wiki/Adapti...te_audio_codec
i'm sure 8kbit/s is doable especially with newer codecs/technology... on quality, who knows?