[asterisk-ss7] Charge indicator

[Gustavo Marsico]

Unfortunately Asterisk doesn't have any way to map the charge indicator in SIP. Actually, there are a couple of drafts, but nothing serious at this time.
If the other side supports it, you can send a P- or X- header to let the other side knows if the call is chargeable or not.

IMHO, in SIP terms, this is one of two biggest challenges for this protocol. The other is the lack of support of SUSpend RESume capabilities in the local loop side.

Regards,

Gustavo


On 5 Feb 2010, at 22:56, Bruno Rodrigues de Mello wrote:

> Hi Jorge,
> 
> My problem is not when I receive a call but when I send a call to telco.
> I use my asterisk box like a gateway and receive sip calls to route this calls to PSTN.
> In some cases the Telco send a ACM with charge indicator = 1 (no charge) and after this 
> the telco send a ANM.
> When asterisk receive the ANM, it send a 200 Ok to SIP side and my softswitch start bill the call.
> 
> Anyone has a idea ?
> 
> Regards,
> Bruno Rodrigues
> 
> 
> 
> From: Jorge Valencia 
> Sent: Friday, February 05, 2010 6:20 PM
> To: asterisk-ss7 at lists.digium.com 
> Subject: Re: [asterisk-ss7] Charge indicator
> 
> 
> Hi Bruno, well last year i had the same problem, it was posted here.  My solution was modify the source, inside isup.c you need modify the code, find this function static FUNC_SEND(backward_call_ind_transmit) and add some lines. I think Matt was going to setup an option..anyway here is the code
> 
> 
> static FUNC_SEND(backward_call_ind_transmit)
> {
>  unsigned char alwayscharge= 2;
>  parm[0] = 0x40 | alwayscharge;
>  parm[1] = 0x14;
>  return 2;
> }
> 
> Regards
> 
> Jorge Valencia G.
> Operaciones
> Will Telefonía SA
> Santo Domingo 1894 - Santiago - Chile
> +56 2 5720000
> 
> 
> 
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