[asterisk-users] Calls hang up after 20 seconds

[Gianni Fioretta]

----- "Kevin P. Fleming" <kpfleming at digium.com> ha scritto:

| Da: "Kevin P. Fleming" <kpfleming at digium.com>
| A: "Asterisk Users Mailing List - Non-Commercial Discussion" <asterisk-users at lists.digium.com>
| Inviato: Lunedì, 19 ottobre 2009 14:03:53
| Oggetto: Re: [asterisk-users] Calls hang up after 20 seconds
|
| SIP wrote:
| 
| > In an ideal world, when Asterisk sent an ACK, whatever server/client
| it
| > was connected to would respond accordingly. It is, however, not an
| ideal
| > world, so this doesn't always happen.
| 
| This is not correct; there are no responses to SIP ACK messages. In
| addition. ACK messages are *required* for proper SIP operation; lack
| of
| an ACK to a response from Asterisk absolutely requires that Asterisk
| assume that either the response was never delivered to the requester,
| or
| that that requester has stopped responding. In either case, the SIP
| dialog/transaction in question must be terminated, because it is no
| longer in a determinate state.
| 
| If the SIP network does not route ACK responses properly, it is
| broken.

The SIP network from SIP server (ie EuteliaVoIP) to Asterisk?
Internal network works correctly, internal calls are ok.
Can I do something to favour the route of ACK responses with my firewall? Maybe opening, or forwarding something?
Now port 5060 is opened in TCP and UDP,
and ports from 10000 to 20000 are opened in UDP only.

Another "Asterisksm":
if I restart Asterisk, initially calls works... after 1 or 2 hours every call hangs up after 20 seconds.

Any suggestion would be appreciated.

| 
| -- 
| Kevin P. Fleming
| Digium, Inc. | Director of Software Technologies
| 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
| skype: kpfleming | jabber: kpfleming at digium.com
| Check us out at www.digium.com & www.asterisk.org
| 
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-- 
Gianni Fioretta - gianni.fioretta at yetopen.it

YetOpen S.r.l. - http://www.yetopen.it/
Via Previati 72 - 23900 Lecco - ITALY -
Tel 0341 220 205 - Fax 178 607 8199

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Grazie.