24 Jun
2020
24 Jun
'20
10:29 p.m.
Hello
I may not describe the problem clearly. When a UE call a number to the
Kamailio IMS core, says, the number is 12345678, the R-URI in the SIP
INVITE is
"sip:12345678;phone-context=ims.mnc001.mcc001.3gppnetwork.org@ims.mnc001.mcc001.3gppnetwork.org;user=phone",
Kamailio P-CSCF pass to INVITE to S-CSCF, and then S-CSCF pass to
I-CSCF, I-SCSF trigger LIR to HSS with Public-Identity = tel:12345678,
This IMPU did not provision in HSS, so HSS response with
"DIAMATER_ERROR_USER_UNKNOWN".
On receiving this LIA, I-CSCF return to S-CSCF with "604 Does not
exist anywhere - HSS User Unknown", and then forward to P-CSCF and the
UE.
My question is why I-CSCF did not trigger a DNS/ENUM query after receiving LIA?
attached is the Kamailio configuration that we are using, please advise.
- RBK
On Wed, Jun 24, 2020 at 11:52 PM Valentin Christoph
<Christoph.Valentin(a)kontron.com> wrote:
I don't know your DNS server nor your addressing plan. Probably to modify / add some
zone files
You must be sure to forward the ranges of telephone numbers that you want to forward to
the other domain.
Actually, it DID the request to the DNS/ENUM, but the result was "keep the domain as
it is" or "replace it by the own domain"
If the DNS/ENUM query did NOT succeed, then you would run into route(PSTN) and the
request would be forwarded to "good old CS domain" to find a destination.
-----Ursprüngliche Nachricht-----
Von: sr-users <sr-users-bounces(a)lists.kamailio.org> Im Auftrag von BALL SUN
Gesendet: Mittwoch, 24. Juni 2020 16:49
An: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Betreff: Re: [SR-Users] Kamailio IMS with ENUM
yes. when the HSS profile is not found, it did not route to DNS/ENUM to check, which
portion of configuration should I check?
On Wed, Jun 24, 2020 at 5:31 PM Valentin Christoph <Christoph.Valentin(a)kontron.com>
wrote:
This means the HSS had answered the user is not known in this domain
(lir_term_user_unknown), but then the DNS server insists this telephone number should be
handled by our domain ($rd == NETWORKNAME).
Just enter the user to the HSS database - if it shall be handled by
this domain -
Or configure DNS, so that this telephone number is routed to another domain. - if it
shall be handled by a different domain.
-----Ursprüngliche Nachricht-----
Von: sr-users <sr-users-bounces(a)lists.kamailio.org> Im Auftrag von
BALL SUN
Gesendet: Dienstag, 23. Juni 2020 16:40
An: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Betreff: Re: [SR-Users] Kamailio IMS with ENUM
Thanks. I actually keep having "604","Does not exist anywhere - HSS User
Unknown", so by right, I-CSCF should go to check the ENUM, but it didn't so what
configuration I should enable? is it dispatcher list and needed to enabkle PEERING? below
is the routine that related to "604","Does not exist anywhere - HSS User
Unknown" in icscf.
- RBK
route[lir_term_user_unknown]
{
if (uri =~ "tel:.*") {
# Let's check, if the number can be found in ENUM:
if(!enum_query()) {
# ENUM failed, send it to the PSTN-Gateway:
route(PSTN);
break;
}
# ENUM resolved to another domain
if ($rd != NETWORKNAME) {
t_on_reply("initial_request_reply");
t_on_failure("initial_request_failure");
if (!t_relay()) {
t_reply("500","Error forwarding to external domain"); exit; }; exit;
} else { t_reply("604","Does not exist anywhere - HSS User Unknown");
exit; }; } else { # we received a request for our domain (non-tel), but HSS said
"User Unknown"
if ($rd != NETWORKNAME) {
t_reply("604","Does not exist anywhere - HSS User Unknown"); exit; }
else { # try to forward non-tel request to other domain
t_on_reply("Initial_Request_reply");
t_on_failure("Initial_Request_failure");
if (!t_relay()) {
t_reply("500","Error forwarding to external domain"); exit; }; exit;
}; }; } }
On Tue, Jun 23, 2020 at 8:40 PM Valentin Christoph <Christoph.Valentin(a)kontron.com>
wrote:
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The example I-CSCF and S-CSCF configurations at misc/examples/ims contain usage of the
enum module, afaik.
This could be easily adapted or taken as an example.
-----Ursprüngliche Nachricht-----
Von: sr-users <sr-users-bounces(a)lists.kamailio.org> Im Auftrag von
BALL SUN
Gesendet: Dienstag, 23. Juni 2020 08:53
An: Kamailio (SER) - Users Mailing List
<sr-users(a)lists.kamailio.org>
Betreff: [SR-Users] Kamailio IMS with ENUM
Hi
Is there any information that can help to setup ENUM query in
Kamailio IMS? what we wanted to achieve is to when A in domain A
(the local
domain) makes an INVITE to B, it will check the domain of B from ENUM backend.
if it is not on the local domain, it will route to remote IMS core.
Thanks
- RBK
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