[asterisk-dev] pjsip and timers configuration

Joshua C. Colp jcolp at sangoma.com
Tue Sep 8 12:53:03 CDT 2020

On Tue, Sep 8, 2020 at 2:50 PM Michael Maier <m1278468 at mailbox.org> wrote:

> On 08.09.20 at 11:41 Joshua C. Colp wrote:

> I couldn't see any advertised timer support regarding the option "always"
> in an Invite or elsewhere. According your explanation, this would mean,
> that asterisk would just do an
> Update each Min-SE seconds e.g.? I did not test this obviously.

I am not sure of the interval, but the refresh should occur at some amount
of time.


> According your description above, it is ok, because: on an inbound call
> (as seen by asterisk), the providor is uac (and asterisk uas). As the
> provider anounces itself as refresher,
> it is at the same time uac for the sip call and the device starting the
> refreshs. On an outbound call (as seen by asterisk), the provider is uas
> for the SIP call and uac as performer
> of the refreshes. That's why it "differs" here.


Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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