[SIPForum-discussion] Related ACK

[Rohan Almeida]

Hi Santosh,

The selection of these two methods is always implementation specific.

But as a general practice

c = 0.0.0.0 is used when the call is to be put on hold with out any RTP.

a = inactive a=recvonly  a= sendonly are used when 'music on hold' has to be
played to the CPE.


regrads,
Rohan Almeida
On Tue, Jun 21, 2011 at 8:04 PM, Santosh <knayak.santosh at gmail.com> wrote:

> Thanks Rohan,
> Would you please given me the idea about when we use c = 0.0.0.0 and a =
> inactive and also a= sendonly in place of call hold .
>
> Is there any rules for it or user can use any of this to make a hold.
> Please
> given me the detail idea about it.
>
>
>
>
> Thanks & Regards,
> Santosh
>
> ||-----Original Message-----
> ||From: Rohan Almeida [mailto:almeida.rohan at gmail.com]
> ||Sent: Tuesday, June 21, 2011 19:28
> ||To: Santosh
> ||Cc: discussion at sipforum.org
> ||Subject: Re: [SIPForum-discussion] Related ACK
> ||
> ||Hi Santosh,
> ||
> ||The call hold in SIP is achieved by a re-invite.
> ||there are 2 ways to achieve this
> ||
> ||   1> The connection line (c) in sdp is set to 0.0.0.0
> ||   2> The audio attribute (a) for media in sdp is set to 'inactive'.
> ||
> ||since this is an INVITE dialog, ACK is required to complete the
> ||transaction.
> ||
> ||regards,
> ||Rohan Almeida
> ||
> ||On 6/21/11, Santosh <knayak.santosh at gmail.com> wrote:
> ||> Hi Dear,
> ||>
> ||>  I want  to know after call hold ,  ACK  is need to send or not ?
> ||>
> ||>
> ||>
> ||> Adv in thanx
> ||>
> ||>
> ||>
> ||> Regards,
> ||>
> ||> Santosh
> ||>
> ||> Spectrosoft Technologies
> ||>
> ||>
>
>
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