Hi Paul, 

To clarify, when you say "When A calls B where B is in the form of bbbbb", do 
you mean when the number is represents a telephone number, rather than a SIP 
URI (so it's of the form tel:number, or sip:number@domain;user=phone). 

In this case, Sprout will perform an ENUM lookup on bbbbb, and resolve it to 
whatever has been set up in the ENUM rules - in your example below then every 
lookup will return domain2.

There is a complication here though. By default, Sprout performs a lookup on 
all SIP URIs that use the deployment's home domain, so your ENUM rule will 
rewrite these as well. 

ENUM lookups should only be done when the URI represent a global number (TS 
24.229, 5.4.3.2). A SIP URI that represents a number should add the user=phone 
parameter, however we've found that many SIP clients do not do this. To work 
with these devices, Sprout performs a lookup on all SIP URIs that use the 
deployment's home domain. 
 
There is a configuration option that controls this behaviour 
(enforce_user_phone - see 
https://github.com/Metaswitch/clearwater-docs/wiki/Clearwater-Configuration-Options-Reference#advanced-options).
 Alternatively, you can set the ENUM rule to only rewrite a particular set of 
numbers. 

Hope this helps, 

Ellie

-----Original Message-----
From: [email protected] 
[mailto:[email protected]] On Behalf Of Paul Sun
Sent: 12 November 2014 09:56
To: [email protected]
Subject: [Clearwater] Question on setting up ENUM Fowarding with I-BCF.

HI

I would like to correct my understanding on setting up the ENUM forwarding. In 
my setup, I have I-BCF working together with P/S-CSCF.

- When A calls B where B is in the form of [email protected], it request will 
be routed out by I-BCF.

- When A calls B where B is in the form of bbbbb, it will look up the ENUM 
server through the enum-forwarding setting and resolve the SIP address with 
domain.

If the above understanding is correct, then can I do in this way?

A calls B where B is in the form of bbbbb, in the ENUM server, it is configured 
as below.

* IN NAPTR 1 1 "u" "E2U+sip" "!(^.*$)!sip:\\[email protected]!" .

Once, it reads, the S-CSCF will then go through the I-BCF and route out to 
domain2?

Possible?

- PS

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