[Spce-user] Peer to Peer SPCE (B2BUA)

[Gary Nieboer]

Thanks Daniel,

That makes sense and is very helpful.

Please help me a bit more with this example:

Peer A:  Inbound Only From Carrier A (no outbound)

Peer B:  Default Outbound To Carrier B (no inbound)

Peers C through Peer Z:  Client PBXs  (Trusted for Inbound and Outbound)


A call from Peer D to PSTN will use Peer B for outbound.
A call from PSTN to Peer D will come in on Peer A, match the peering rule
and route to Peer D

Now if Peer D goes off-line and is unavailable:

A call from PSTN to Peer D will come in on Peer A, attempt to Invite Peer D
Peer D is unavailable so the Invite will fail.
Next SPCE attempts the call to Peer B (Outbound PSTN)

Then the call comes back into SPCE on Peer A resulting in a loop.

I prefer that SPCE sends a 503 or similar to Peer A when Peer D isn't
available rather than attempting to route out the default route to Peer D.
 Then Peer A can attempt additional fail-over procedures.

Please let me know if you would like more detail, or if you have any
recommendations.

Thanks in advance for you assistance.

-Gary






On Mon, Jun 2, 2014 at 6:55 AM, Daniel Grotti <dgrotti at sipwise.com> wrote:

>  On 06/02/2014 05:45 AM, Gary Nieboer wrote:
>
> Hello,
>
>  We are testing and using SPCE to connect our Termination and Origination
> Carriers to multiple IP/PBX systems including FreePBX, NEC, Avaya, Cisco,
> Shoretel, etc..
>
>  So far, most items are working very well.   Although we only allow
> traffic from known IP addresses to access the SPCE servers, and we "trust"
> all of the Client PBX systems, we are concerned that one of our carriers
> could send us a call, and if the client PBX doesn't accept the Invite, the
> SPCE will send the call out our default route to another carrier, which
> will then cause a loop.
>
>  Carrier A is inbound, Carrier B is outbound, and our Client PBX systems
> are used for both inbound and outbound.
>
> We are not adding any "subscribers" on these servers.
>
>  Is there a way to allow only traffic between certain peers in certain
> directions?    We would also prefer to send a 503 to Carrier A if we don't
> have a route to the Client PBX systems.
>
>  Thanks in advance for any assistance or recommendations.
>
> -Gary
>
>
> _______________________________________________
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>
>
> Hi,
> if you don't want to use a peering as outbound peer, do not specify any
> peering rules then.
> In that way calls can't go out via that peer. Only inbound calls are
> allowed.
>
> Daniel
>
>
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>
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