[WXC/VFX] VFX and Data

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wmoore

510 posts

Ultimate Geek

#18596 15-Jan-2008 22:13

Hi

Currently in UK staying with the inlaws. Have my SP2102 with me and is set up and working great. Question is how much data would say a 10 min phone call use.

Thanks

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grant_k

3539 posts

Uber Geek

Trusted

#105099 15-Jan-2008 23:17

wmoore: Question is how much data would say a 10 min phone call use.

If you are using the G729 codec (which is the preferred one for general use), a 10 minute phone call will use about 5 - 6MB of data (total of upstream + downstream). If you work on 30 - 35MB per hour as a rough guideline, it will give you a good idea.

You can tell which codec is in use by looking at the Status Screen of your SPA when a call is in progress. If for some reason either of the G711 codecs are being used, the data rate is close to 3x the figures I have mentioned above.

Niel

3267 posts

Uber Geek

Trusted

#105105 15-Jan-2008 23:58

You can also check your modem status screen before and after a call to see how much data was sent/received during the call.

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itey

476 posts

Ultimate Geek

#105248 16-Jan-2008 17:54

which is the best codec for call quality ?

maverick

3594 posts

Uber Geek

Trusted

WorldxChange

#105263 16-Jan-2008 18:51

G711 is a better quality codec but can use up to 3 times the amount of data compared to the G729 codecs, it is also not designed to handle latency and jitter that can be encountered on a ADSL network as well as the G729 codec, it can suffer from call quality due to these issues.

G729 handles DSL line conditions better but it will not be as good as a good G711 call.

Hope that made sense

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