[VoiceOps] Question about billing on SIP trunks

BackUP Telecom Consulting marylou at backuptelecom.com
Fri Sep 21 10:07:50 EDT 2018

I would think it would only matter if the called party is served by the 
PSTN network because that's the only time that MOU billing should take 
place. However, it may be that your service provider doesn't 
differentiate and just bills you  MOU charges based on what you send 
them so that they're covered just in case it hits the PSTN network.

Mary Lou Carey

BackUP Telecom Consulting

Office: 615-771-7868 (temporary)

Cell: 615-796-1111

On 2018-09-20 06:20 PM, Ryan Delgrosso wrote:
> So if it were me operating whoever your provider is, I would take the
> diversion as the originating number of the leg in question and bill
> appropriately, as the PAI/FROM in this case is display only.
> That being said, does the provider youre with make a distinction
> between local/LD? thats relatively archaic these days as the aggregate
> cost of national termination is so low most stopped caring, it might
> be worth considering moving to another provider.
> On 9/20/2018 1:34 PM, Peter Crawford 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
>> 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.
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