[AusNOG] Overstepping Another Number On AAPT SIP Trunk

Joseph Goldman joe at apcs.com.au
Tue Aug 2 15:23:50 EST 2016


I think it depends.

If you are getting a wholesale SIP trunk, then yes i think there is 
generally a full trust relationship, but if they are an end user 
(whether residential or business) I think it would be more common that 
the CID is set on the providers end and ignores anything from the CPE 
(even if it is another full blown PBX). I know this is how I conduct my 
end users (but it is 99% residential VoIP) and im sure many others would 
do the same or have limited process (Like Ben pointed out) to get 
approved number(s).

On 02/08/16 15:03, Nathan Brookfield wrote:
> Overstamping is a very common practice and almost all carriers support 
> this, for example where a client may use PSTN for inbound and SIP for 
> outbound or where the customer may have several hundred DID's that all 
> pass out a single trunk.
>
> We only allow this as an option for Wholesale customers but certainly 
> something allowed and supported by Telstra, Optus, Symbio, Vocus etc.
>
> Nathan Brookfield
> Chief Executive Officer
>
> Simtronic Technologies Pty Ltd
> http://www.simtronic.com.au
>
> On 2 Aug. 2016, at 14:57, Christian Legg 
> <christian.legg at mybudget.com.au 
> <mailto:christian.legg at mybudget.com.au>> wrote:
>
> I didn’t think that overstamping of CLI on SIP trunks was permitted 
> under telco regulations – anyone know otherwise?
>
> Our SIP trunks only have CLI that is associated with the number ranges 
> assigned to the SIP trunks, so my thought could just be based on the 
> fact that we’re not doing it ourselves.
>
> C
>
> *Christian Legg**|* *Infrastructure Specialist*
>
> *D*08 8215 7558 *|**P* 1300 300 922 *|**F* 08 8312 5570
>
> christian.legg at mybudget.com.au <mailto:christian.legg at mybudget.com.au> 
> *|*mybudget.com.au <http://www.mybudget.com.au/>
>
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> *From:*AusNOG [mailto:ausnog-bounces at lists.ausnog.net] *On Behalf Of 
> *Andrew Kitchen
> *Sent:* Tuesday, 2 August 2016 2:22 PM
> *To:* ausnog at lists.ausnog.net <mailto:ausnog at lists.ausnog.net>
> *Subject:* [AusNOG] Overstepping Another Number On AAPT SIP Trunk
>
> Hey Ausnoggers
>
> Just wondering if anyone has successfully overstamped a different 
> number over an AAPT SIP Trunk.
>
> Example
>
> Site 1 has PSTN and SIP
>
> When client makes a call out via SIP channel the PSTN number is 
> overstamped in place of the SIP number.
>
> AAPT has advised that it isn’t possible to do but I have seen other 
> SIP providers like Engin do this.
>
> Would love some help on this if possible
>
> Regards
>
> Andrew
>
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