[SIPForum-discussion] SIP Call Waiting Messages and Call Charges

[Rohan Almeida]

Hi Stewart,

you are absolutely right, The 'on-busy-greeting'  should be played using
early media (SIP 183 sesssion progress).

These announcements will generally be played from a MRF(Media resource
function). The call between the CPE(caller) and MRF can be established using

1> INVITE
2> 183 session progress

If the call is establised using INVITE, the caller might be charged.
Popular softswitches like broadsoft provide the facility to play
announcements using both the mechanisims. The method chosen is configurable.

Generally the CDRs generated by  the PBX, sofswitches will show the actual
call duration starting from when the call was actually picked up the call.

regards,
Rohan Almeida

On Wed, Oct 5, 2011 at 3:14 PM, Stewart Hayles <shayles at neci.co.uk> wrote:

>  Hello all,****
>
> ** **
>
> I have a question I hope someone out there may be able to help me with
> understanding a bit more clearly.****
>
> ** **
>
> In Germany a new law is coming into effect where if a caller is held
> waiting on a line and listening to a queue message they are not charged for
> that portion of the call until a user actually picks up to speak with them.
> ****
>
> ** **
>
> I wondered how this would be implemented with regards to SIP carriers.
> Would the call be initially setup using early media to play the message?  Is
> there any fields/messages used for charging information between the network
> and PBX?****
>
> ** **
>
> I hope someone may have an understanding of what I am describing, would
> appreciate any details you may have on this if you have been involved in
> similar situation.****
>
> ** **
>
> BR,****
>
> ** **
>
> Stewart****
>
> ** **
>
> ** **
> <http://www.neci.co.uk/>  <http://www.neci.co.uk/>
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