[SIPForum-discussion] Bye Method
Paul Kyzivat
pkyzivat at alum.mit.edu
Tue Jul 7 17:13:29 UTC 2015
On 7/7/15 12:49 PM, S at mir Telecom wrote:
> Hi,
>
> If Offer & Answer model case, can send after 180 ringing(With SDP-Answer).
>
> INVITE-------A sends SDP offer to ------------>B
> <----------------180/183--B sends SDP Answer-------------- ///One way
> flow...............
> BYE ---------------A can send------------------------>
BYE is good here, and A really has no other option.
> 2nd:
>
> Forking Case............
>
>
> A---INV-->B1
> <--180----
> A----CAN-->
> A--INV--->B2
In the above case cancel works because A is doing the forking, and the
forking is serial.
But consider the case where parallel forking is done by an intermediate
proxy. A sees two early dialogs and wants to keep one of them. It cannot
use cancel for that - only BYE works in that case.
In the case where B wants to end the call early, it always has the
option to send a final error response, so there is no obvious motivation
for using cancel.
Thanks,
Paul
> On Tue, Jul 7, 2015 at 10:16 PM, S at mir Telecom <samir2voice at gmail.com
> <mailto:samir2voice at gmail.com>> wrote:
>
> Hi,
>
> If Offer & Answer model case, can send after 180 ringing(With
> SDP-Answer).
>
> INVITE-------A sends SDP offer to ------------>B
> <----------------B sends SDP Answer-------------- ///One way
> flow...............
> BYE ---------------A can send------------------------>
>
>
>
> On Mon, Jul 6, 2015 at 4:27 AM, Paul Kyzivat <pkyzivat at alum.mit.edu
> <mailto:pkyzivat at alum.mit.edu>> wrote:
>
> On 6/19/15 3:39 PM, Suman Mohanty wrote:
> > Hi All,
> >
> > Can anyone explains in which scenario we can send bye message
> > after receiving the 180 ringing?
>
> If A calls B and B returns 180 ringing, then there are good
> reasons for
> A to send BYE to B:
>
> 1) A changes mind about call and hangs up before getting a final
> response;
>
> 2) call is forked to B1 and B2. A decides to send BYE to B1 and
> wait on B2.
>
> There aren't very good reasons for B to send BYE to A, because
> it is in
> a position to send a variety of final error responses that are more
> specific than Bye.
>
> I don't *think* it is forbidden. A robust implementation should
> probably
> do the reasonable thing in this case. I would treat it as
> semantically
> equivalent to a 603 response. (But note that you still need to
> send an
> ACK to the INVITE.)
>
> Thanks,
> Paul
>
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>
> --
> ~S at mir <mailto:%7ES at mir>
> M-0033762159688
> PARIS
> France
>
>
>
> ~Chant this Maha Mantra* This is only the medicine Recovery from
> this Materialism...
> *******************************************************************************************************
> "" Hare Krishna Hare Krishna
> Krishna Krishna Hare Hare"
> ""Hare Ram Hare Ram"
> Ram Ram Hare Hare""
> *********************************************************************************************************
> anta-kāle ca mām eva
> smaran muktvā kalevaram
> yaḥ prayāti sa mad-bhāvaṁ
> yāti nāsty atra saṁśayaḥ
>
> <And whoever, at the time of death, quits his body, remembering Me
> alone, at once attains My nature. Of this there is no doubt.
>
> >In this verse the importance of Kṛṣṇa consciousness is stressed.
> Anyone who quits his body in Kṛṣṇa consciousness
> is at once transferred to the transcendental abode of the Supreme
> Lord. The word smaran (remembering) is important.
> Remembrance of Kṛṣṇa is not possible for the impure soul who has
> not practiced Kṛṣṇa consciousness in devotional service.
> To remember Kṛṣṇa one should chant the mahāmantra, Hare Kṛṣṇa, Hare
> Kṛṣṇa, Kṛṣṇa Kṛṣṇa,
> Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare,
> incessantly, following in the footsteps of Lord Caitanya,
> being more tolerant than the tree, humbler than the grass and
> offering all respect to others without requiring respect
> in return. In such a way one will be able to depart from the body
> successfully remembering Kṛṣṇa and so attain the supreme
> goal.
>
>
> Visit: www.folknet.in <http://www.folknet.in/>
>
> http://prabhupadabooks.com/?g=637
>
>
>
>
> --
> ~S at mir <mailto:%7ES at mir>
> M-0033762159688
> PARIS
> France
>
>
>
> ~Chant this Maha Mantra* This is only the medicine Recovery from this
> Materialism...
> *******************************************************************************************************
> "" Hare Krishna Hare Krishna
> Krishna Krishna Hare Hare"
> ""Hare Ram Hare Ram"
> Ram Ram Hare Hare""
> *********************************************************************************************************
> anta-kāle ca mām eva
> smaran muktvā kalevaram
> yaḥ prayāti sa mad-bhāvaṁ
> yāti nāsty atra saṁśayaḥ
>
> <And whoever, at the time of death, quits his body, remembering Me
> alone, at once attains My nature. Of this there is no doubt.
>
> >In this verse the importance of Kṛṣṇa consciousness is stressed.
> Anyone who quits his body in Kṛṣṇa consciousness
> is at once transferred to the transcendental abode of the Supreme Lord.
> The word smaran (remembering) is important.
> Remembrance of Kṛṣṇa is not possible for the impure soul who has not
> practiced Kṛṣṇa consciousness in devotional service.
> To remember Kṛṣṇa one should chant the mahāmantra, Hare Kṛṣṇa, Hare
> Kṛṣṇa, Kṛṣṇa Kṛṣṇa,
> Hare Hare/ Hare Rāma, Hare Rāma, Rāma Rāma, Hare Hare, incessantly,
> following in the footsteps of Lord Caitanya,
> being more tolerant than the tree, humbler than the grass and offering
> all respect to others without requiring respect
> in return. In such a way one will be able to depart from the body
> successfully remembering Kṛṣṇa and so attain the supreme
> goal.
>
>
> Visit: www.folknet.in <http://www.folknet.in/>
>
> http://prabhupadabooks.com/?g=637
>
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