Google Voice testing data calls

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Google Voice testing data calls

 

[system32]

VoIP FTW

Calls [VoIP] use approximately 0.2MByte of data per minute, although this may vary – depending on the bandwidth available and network quality.

The 0.2MB per minute is reasonable average.
If you use a modern codec like Opus, the VoIP bandwidth is

• Opus 2.8Kbit/s-72.12Kbits/s (one person speaking at a time, including overhead)

24Kbit/s should give full band (HD).

72.12Kbits/s = 0.54MBytes/s (one person speaking at a time, worst case)
MTN 1GB costs R149.00, which works VoIP out at less than 8c per minute.

8c VoIP is much cheaper than:
MTN Pay Per Second – 99c per minute for voice calls.
MTN Talk Free – calls to other networks R1.20 per minute.

See
Asterisk Bandwidth Calculator
http://www.asteriskguru.com/tools/bandwidth_calculator.php

WhatsApp uses similar bandwidth for voice calls, see
The data cost of WhatsApp voice calling in SA
https://mybroadband.co.za/news/smartphones/122106-the-data-cost-of-whatsapp-voice-calling-in-sa.html

 

[sajunky]

I agree. Standard telephone codec G.711 (no compression) is 60kbps.
Full duplex with signalling overhead is far below 200kbps which is quoted.

What Google is transmitting simultaneously if it needs 200kbps?

 

[rph72]

Installed the app, but the service doesn't seem to be available here.