[SIPForum-discussion] HELP: a question about stateful proxy

[Tomasz Zieleniewski]

well depends on Your network
but from my experience rather seldom

- Tomasz

2009/8/11 nancy.fan <fanyanping at huawei.com>

>  thanks for the reply ^_^
>
> I want to know , is it very frequent that all the
> provisional responses(include 100,180) are lost over UDP transport??
>
>
> Best Regards.
>
> nancy
>
>  ------------------------------
> *From:* Tomasz Zieleniewski [mailto:tzieleniewski at gmail.com]
> *Sent:* Tuesday, August 11, 2009 3:34 PM
> *To:* nancy.fan
> *Cc:* discussion at sipforum.org
> *Subject:* Re: [SIPForum-discussion] HELP: a question about stateful proxy
>
> Hi,
>
> Nancy stateful proxy must send 100 response, of course only
> for INVITE requests, unless it knows it will generate other response
> within 200ms (in fact very seldom check).
> If 100 response reaches UAC which sent the INVITE
> then the UAC stops any further retransmissions. But
> keep in mind that 100 response can be sent through
> unreliable UDP transport and can be lost.
> In such case UAC will fire retransmission.
>
> Kind regards,
> - Tomasz Zieleniewski
>
> 2009/8/10 nancy.fan <fanyanping at huawei.com>
>
>> Hi  all,
>> I have a confusion that in SIP protocol is it Mandatory a stateful proxy
>> must send a 100 response when it receives an invite request ?? A stateful
>> proxy will not receive request retransmissions??
>>
>> if the description  as before is not true ,  then, in which case the
>> stateful proxy will receive request retransmissions??
>>
>>
>>
>> Best Regards.
>>
>>
>> nancy
>>
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