|I'm quite fond of GSM610 as a low(ish) bandwidth codec - although it isn't as good as (say) speex or Silk,|
it is widely supported, and European users have had years of cellphone use to get used to the specific
sound of a GSM call. So you can often go from a GSM610 supporting handset all the way through to a
GSM supporting ITSP without needing to transcode at all.
If at all possible avoid creating a path which involves 2 different lossy codecs - e.g. 729 _and_ GSM
the results are significantly worse than either.
If you can control all of the call path and have devices that support it, Silk is _lovely_ . It takes a bit of tuning
for your expected network (which is unfortunately manual in Asterisk 10) but it is worth it.
On 15 Apr 2012, at 12:15, Gustavo Garcia Bernardo wrote:
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