Hi Tam,

While it’s true that Ellis/Homestead-prov don’t support PSI’s in their standard 
implementation (Clearwater requires an external HSS to support this), it is 
possible to implement a PSI as a special type of IMPU:


1.       Creating an IMPU that will act as the PSI (you can pick a specific 
number for the IMPU if you like by using the homestead provisioning API 
directly or using the specific number provisioning API on Ellis, documented at 
https://github.com/Metaswitch/ellis/blob/dev/docs/api.md#provisioning-specific-numbers)

2.       Configuring your service’s application server(s) to be triggered for 
that IMPU in session case TERMINATING_UNREGISTERED

3.       Don’t register any UEs with that IMPU (feel free to forget the SIP 
password entirely if you like ☺)

Now this IMPU will invoke your Application Server when it is called (as if the 
IMPU were a standard PSI).

Hope this helps,

Andy

From: Clearwater [mailto:[email protected]] On 
Behalf Of Eleanor Merry
Sent: 07 October 2015 11:55
To: atva angel; Clearwater Mail
Subject: Re: [Clearwater] Regarding to IMPU and PSI on Clearwater

Hi Tam,

We don’t support provisioning Tel URIs through Ellis/Homestead-prov. If you use 
an external HSS (see 
http://clearwater.readthedocs.org/en/latest/External_HSS_Integration/index.html 
for details) then you can create Tel URI IMPUs in that. Clearwater will deal 
correctly with Tel URIs if it receives requests using them.

We also don’t support provisioning PSIs through Ellis/Homestead-prov.

Ellie

From: Clearwater [mailto:[email protected]] On 
Behalf Of atva angel
Sent: 05 October 2015 19:19
To: Clearwater Mail
Subject: Re: [Clearwater] Regarding to IMPU and PSI on Clearwater

Hi all,

Could you please help to take a look and share your advice?

Thanks,
Tam


On Sunday, September 13, 2015 10:47 PM, atva angel 
<[email protected]<mailto:[email protected]>> wrote:

Hi community,

Could you please help to clarify some cases as below?
1. As normal, I can define the IMPU on Ellis with SIP-URI format, i.e:
IMS user 12345678 has IMPI: [email protected]<mailto:[email protected]>, 
IMPU - sip:[email protected]. I wonder if Ellis/Clearwater could support 
TEL-URI format for the IMPU of IMS user or not, i.e: tel:+112345678
2. I can not find where to define the IMS PSI on Ellis/Clearwater. Could you 
please to share your advice for this case?

Thanks,
Tam



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