Yep - as I mentioned a good SIP implementation handles the NAT problems. On 4 April 2010 18:45, HeHe <[email protected]> wrote: > i believe the latency you said is far less than that incurred by user > interaction to answer a call. > > once the call is established, sip does not contribute to any latency > or voice quality. > > as for NAT issue, ICE can help solve the issue. NAT is not specific to > SIP. if you believe that other signaling protocols leveraging on TCP > or any reliable transport protocol can eliminate NAT concern, you > should also believe in SIP -- SIP works with TCP/TLS, too :) > > On Apr 4, 8:39 am, David Ashwood <[email protected]> wrote: >> 5 sip messages on a connection that can have high latency.... >> Very similar to the ssl lag issues you can experience on mobile connections. >> >> Something that people often misunderstand is that many operators have >> a NAT'd address space for data users - which can cause issues with SIP >> when it's not factored in correctly or implemented well. >> >> On 4 April 2010 17:33, HeHe <[email protected]> wrote: >> >> >> >> > sip is a signaling protocol. in most cases it needs only 5 sip msgs to >> > establish a call. i don't think sip alone can affect voip quality -_- >> >> > On Apr 4, 6:15 am, David Ashwood <[email protected]> wrote: >> >> Not specific to sipDrioid - but I've used a few voip clients on the N1 >> >> without any major issues. SIP is an inherently noisy protocol >> >> compared to IAX - so you might be seeing other issues affecting >> >> quality. SIP doesn't require a public IP address - there are a >> >> variety of implementations that get around NAT'ing issues. >> >> >> I'm still hoping & waiting for a Google Talk invite to see how it >> >> compares to the other mainstream providers - Fring & Skype. >> >> >> On 4 April 2010 13:52, Andy Burns <[email protected]> wrote: >> >> >> > JP wrote: >> >> >> >> SipDroid to my knowledge only works with a single provider. It also >> >> >> does not offer the capability to be connected to a PBX such as >> >> >> Asterisk. >> >> >> > I have successfully used sipdroid (over WiFi) to an asterisk PBX, call >> >> > quality seemed fine. I would say I haven't used it for long enough yet >> >> > to >> >> > spot any potential problems. >> >> >> > -- >> >> > You received this message because you are subscribed to the Google >> >> > Groups >> >> > "Android Discuss" group. >> >> > To post to this group, send email to [email protected]. >> >> > To unsubscribe from this group, send email to >> >> > [email protected]. >> >> > For more options, visit this group at >> >> >http://groups.google.com/group/android-discuss?hl=en. >> >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "Android Discuss" group. >> > To post to this group, send email to [email protected]. >> > To unsubscribe from this group, send email to >> > [email protected]. >> > For more options, visit this group >> > athttp://groups.google.com/group/android-discuss?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Android Discuss" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/android-discuss?hl=en. > >
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