[VoiceOps] Question about billing on SIP trunks

Peter Crawford pdcraw27 at gmail.com
Mon Sep 24 08:15:02 EDT 2018

Thank you all for the feedback.

This confirms my initial thought- that FROM is probably the last thing that
should be used.

On Fri, Sep 21, 2018 at 10:41 AM Pete Eisengrein <peeip989 at gmail.com> wrote:

> As mentioned, the P-Asserted-Id should do the trick. I can't find an RFC
> for it, nor where I saw this previously, but there is an order of
> precedence for the headers. I don't remember them all but I do know that
> P-Asserted-Identity > Diversion > From
> The other headers fit in there somewhere too, but I think PAI is really
> what you want.
> On Thu, Sep 20, 2018 at 4:38 PM Peter Crawford <pdcraw27 at gmail.com> wrote:
>> Hello voice-ops:
>> Enterprise admin here.
>> We just converted from ISDN to SIP (and changed providers) and we're
>> seeing some undesirable billing behavior.  I'm hoping I can get some
>> objective feedback from different providers.
>> If a call comes into our system, and we forward it off-net using the SIP
>> trunks (using either "standard" call forwarding or a call
>> forking/paralleling feature like Avaya's EC500 or Cisco's Single Number
>> Reach), we send the call with the SIP FROM header of the original caller
>> (which is desirable to preserve callerID).  We also include a Diversion
>> Header with one of our phone numbers (the original destination of the call).
>> We're being billed based on the *original* calling number, which
>> sometimes results in long distance charges, even if this leg of the call is
>> local to us.  This is particularly onerous if the inbound call is
>> international!
>> So, the question is- what *should* we be billed on: FROM or DIVERSION.
>> At one point, the provider indicated that P-Charge-Info was supported,
>> but now backing away from that.
>> Do we have any recourse (technical or otherwise)?
>> Thanks.
>> _______________________________________________
>> VoiceOps mailing list
>> VoiceOps at voiceops.org
>> https://puck.nether.net/mailman/listinfo/voiceops
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