[asterisk-users] STIR/SHAKEN

John Millican john at millican.us
Thu Mar 11 18:52:56 CST 2021

There are many reasons why someone would want the DIDs provided by one 
provider and outbound calls to go out via 1,2 3, or more providers.
In one of my installs I have a situation where local calls are placed 
via a local telco switch but LD calls go out via a voip provider.  The 
Local telco has the DID but the LD does not so I have to verify the DIDs 
with the Voip provider(s).
Another case may be for least cost routing.
There are other reasons but you can see that it is not always as simple 
as using the same provider for DID and origination.

On 3/11/21 3:34 PM, Sebastian Nielsen wrote:
> I reallt don’t understand why people simply use the same operator to 
> terminate your calls, which also provide DIDs for you.
> Then you don’t need to touch this at all, your carrier will do all the 
> STIR/SHAKEN handling for you, you are just a PBX customer.
> And then the operator then simply limits your account to only present 
> your DID as outgoing number.
> Seems to be a unneccesary complicated solution just to have your 
> numbers at company 1 and have your call termination at company 2.
> So fricking unneccessary.
> What I know there is requirements of number portability, so as long as 
> company 2 can handle DIDs (ergo ”own” DIDs) you should be able to move 
> your DIDs from company 1 to company 2 – then company 2 owns your DIDs.
> Best regards, Sebastian Nielsen
> *Från:* asterisk-users-bounces at lists.digium.com 
> <asterisk-users-bounces at lists.digium.com> *För *Alexander Perkins
> *Skickat:* den 12 mars 2021 01:23
> *Till:* asterisk-users at lists.digium.com
> *Ämne:* Re: [asterisk-users] STIR/SHAKEN
> Hi Jeff.  What exactly do you mean by the 'inbound piece'?  I've spent 
> quite a lot of time with the folks at TILTX understanding the 
> framework; but I am not exactly sure what you mean by the 'inbound piece.
> Greg/Doug, like many folks here, we use LCR.  So, the terminating 
> carrier is not necessarily the one that issued us the telephone 
> numbers.  So, they will not sign it or simply cannot sign it.  
> Remember that a very limited number of companies can actually sign the 
> calls; the rest have to buy it from these 'Service Providers'.
> And there is another situation - the company you purchase your numbers 
> from and the company you place your calls through may be different and 
> both may not be able to sign your calls.  Again, a very limited number 
> of service providers that can actually sign your calls. So what do you 
> do in that scenario?  You have to find a Service Provider that can:
> 1.  Verify you own that telephone number(s).
> 2.  Sign your calls.
> 3.  Provide you with the technical means to do so.
> So, that's that...  I hope this makes sense.
> Alex

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