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.
>>
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