[asterisk-users] How do extensions "stay registered"

[eherr]

I think the wrap up answer is the interval of registration compacted, if used, with the SIP OPTION packet.

 

I like the SIP OPTION packet because we have scripts to monitor the status and lets us know when a phone is up or down.

 

--E

 

From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Carlos Alvarez
Sent: Monday, November 14, 2011 5:30 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: Re: [asterisk-users] How do extensions "stay registered"

 

I think the registration part was answered.  The de-registration part is different.  If the phone is gracefully taken off line it
specifically de-registers.  If it just can't be reached because it powers off or the router closes NAT, or whatever, then Asterisk
won't know this until it times out.

 

On Mon, Nov 14, 2011 at 3:19 PM, eherr <email.eherr9633 at gmail.com> wrote:

I think the question is more along the lines of how does asterisk know immediately when a sip phone becomes on line and when you
unplug the phone from the network, how does asterisk essentially know immediately that it status is "UNKNOWN"

 

If I am not mistaken.

 

--E

 

From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Danny Nicholas
Sent: Monday, November 14, 2011 5:01 PM
To: 'Asterisk Users Mailing List - Non-Commercial Discussion'
Subject: Re: [asterisk-users] How do extensions "stay registered"

 

"Extensions" do not register - peers do.  A peer can register itself or be registered by Asterisk.  In most cases the "extension" is
equivalent to the "peer" (301 = 301) but it can be quite different (301 = sipuser1) or (301 = doug at impalanetworks.com).

 

From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Douglas Mortensen
Sent: Monday, November 14, 2011 3:52 PM
To: 'asterisk-users at lists.digium.com'
Subject: [asterisk-users] How do extensions "stay registered"

 

I know this is probably a very basic question for many on this list. But in troubleshooting an issue, I wanted to take a step back &
ask the question. In Asterisk (or maybe all SIP), how do extensions stay registered with the SIP server?

 

Do the extensions simply register repeatedly as a means of telling asterisk "I'm still here", or are there actual keepalive packets
that are transmitted to actually keep a TCP session alive? My guess is the former.

 

But am I oversimplifying it? Is there more to the process?

 

Thanks,

-

Doug Mortensen

Network Consultant

Impala Networks Inc

CCNA, MCSA, Security+, A+

Linux+, Network+, Server+

.

www.impalanetworks.com

P: (505) 327-7300 <tel:%28505%29%20327-7300> 

F: (505) 327-7545 <tel:%28505%29%20327-7545> 

.

 


--
_____________________________________________________________________
-- Bandwidth and Colocation Provided by http://www.api-digital.com --
New to Asterisk? Join us for a live introductory webinar every Thurs:
              http://www.asterisk.org/hello

asterisk-users mailing list
To UNSUBSCRIBE or update options visit:
  http://lists.digium.com/mailman/listinfo/asterisk-users





 

-- 

Carlos Alvarez

TelEvolve

602-889-3003

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.digium.com/pipermail/asterisk-users/attachments/20111114/1604b228/attachment.htm>