[asterisk-users] Rining 180 and 183

[Jared Smith]

On 6/25/07, satish patel <satish_patel_2000_2000 at yahoo.com> wrote:
>                    I have confusion how to asterisk genrate tone and what
> ringing code use default 180 or 183  i have setup asterisk with mediant 2000
> with avaya

I'm assuming that you're talking SIP here... typically, if Asterisk
receives a 180 response (without SDP), it will pass that on to the end
device, which will generate the ringback tone itself.  On the other
hand, if Asterisk receives a 183 with SDP (or a 180 with SDP, which is
less common), it will try to bridge the end device with the media
specified in the SDP message.

Your best bet would be to look at the SIP messaging, specifically
looking to see if there is SDP specified.  If SDP is specified in the
183 or 180 message, then I'd try to figure out why Asterisk can't
connect to that IP address and port.  (In my experience, nine times
out of ten this is a NAT firewall problem.)

-Jared