2009/2/5 Attila Sipos <[email protected]>:
> So, a typical ENUM-capable SIP UA could reasonably
> have separate configuration for DNS servers and
> for listing ENUM-lookup servers.
>
> Do you agree?
Not exactly. sincerelly I didn't speak about ENUM for SIP UA, but for
SIP providers in order to map a PSTN number to a SIP account. For
example:
- A SIP provider proxy receives a call from a PSTN gateway with
destination number +34999888777.
- The proxy does a NAPTR query to its *private* ENUM DNS server:
NAPTR 7.7.7.8.8.8.9.9.9.4.3.e164.sipprovider.com
- The DNS replies "sip:[email protected]".
- The proxy ask its location server to know if that local user is
register and if so routes the INVITE to its location.
I do no mention to ENUM for endpoints as you see. Anyway, some SIP
softphones have a DNS configuration option, in which the user can set
a DNS server different from the DNS server configured for the host
system (/etc/resolv.conf in case of Linux).
--
Iñaki Baz Castillo
<[email protected]>
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