30 May
2018
30 May
'18
2:20 p.m.
Beware that "low cost provider" may not just reject the call, which you can recover from, but can mess you up in a large number of ways. Some of which you can try to work around (debugging + time), some of which you may not be able to figure out. - Not properly passing along DTMF - very long PDD - FAS fake answers - Returning "USER_BUSY" when it's not actually busy - Returning "NORMAL_TEMPORARY_FAILURE" when it's actually busy - poor audio quality - Issues with proxies/re-invite/switching codecs, etc. - .. and I'm sure many more. ... Just some of the many issues I've run into when using multiple carriers and terminating to countries around the world. -Avi Marcus BestFone