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<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'">Hi Tim,</FONT></SPAN><SPAN
class=084212113-14022008><FONT face="'Times New Roman'"><BR></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'"><FONT face="'Times New Roman'">Imagine the
scenario where we had 10x Asterisk servers, with calls presenting sequentially
starting from the first server, then server two, etc.</FONT></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'"><FONT
face="'Times New Roman'"></FONT></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'"><FONT face="'Times New Roman'">If we took down the
first server for maintenance with 'asterisk -rx stop gracefully' we then will
block all incoming calls to all servers as our telco will simply relay the BUSY
back to the caller. If there are a number of calls on the first server that
continue for another 20 minutes, then all inbounds are blocked for that period
of time.</FONT></FONT></SPAN></DIV>
<DIV><SPAN class=084212113-14022008><FONT face="'Times New Roman'"><FONT
face="'Times New Roman'"></FONT></FONT></SPAN> </DIV>
<DIV><SPAN class=084212113-14022008><FONT face="'Times New Roman'"><FONT
face="'Times New Roman'"><FONT face="'Times New Roman'">We are finding at
present we have to look at the calls on the server and make a decision if we are
busy to simply reboot the server and hence lose calls. Not ideal but then we
don't end up blocking our inbounds.</FONT><BR><BR>What I was hoping to do was
find a way to cause the telco to present the call to the next ISDN30 and
therefore would allow us to cleanly take down an Asterisk server for maintenance
without causing this issue. In a sense to put the ISDN30 into alarm mode while
still continuing the active calls.</FONT></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'"></FONT></SPAN> </DIV>
<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'"><FONT face="'Times New Roman'">Do you know if this is
at all possible, even if we considered patching zaptel to add this functionality
or does the telco rely on the entire PRI being in alarm before it presents the
call to the next ISDN30 ? This would allow us to run maintenance on our servers
during busy periods without causing disruption, and would be an excellent
feature.<BR><BR>Many thanks,</FONT></FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=084212113-14022008><FONT
face="'Times New Roman'">Andrew</DIV></FONT></SPAN><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
<HR tabIndex=-1>
<FONT face=Tahoma size=2><B>From:</B> asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] <B>On Behalf Of </B>Tim
Nelson<BR><B>Sent:</B> 13 February 2008 18:12<BR><B>To:</B> Asterisk Users
Mailing List - Non-Commercial Discussion<BR><B>Cc:</B>
asterisk-users@lists.digium.com<BR><B>Subject:</B> Re: [asterisk-users] ISDN
PRIs and taking a server down for maintenance - blocking
issue<BR></FONT><BR></DIV>
<DIV></DIV>Even if * is shutdown, zaptel is still running and your ISDN channels
are still technically up. Shutting down zaptel should close the channels and put
those circuits into alarm
mode.<BR><BR>Tim Nelson<BR>Systems/Network Support<BR>Rockbochs Inc.<BR>(218)727-4332<BR><BR>-----
Original Message -----<BR>From: "Andrew Smith"
<andrews@meadeplc.com><BR>To: asterisk-users@lists.digium.com<BR>Sent:
Wednesday, February 13, 2008 12:03:51 PM (GMT-0600) America/Chicago<BR>Subject:
[asterisk-users] ISDN PRIs and taking a server down for maintenance - blocking
issue<BR><BR>
<DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial size=2>Hi
there,</FONT></SPAN></DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial size=2>I currently have
multiple Asterisk servers using Sangoma A104d Quad ISDN
E1s.</FONT></SPAN></DIV><SPAN class=583264717-13022008>
<DIV><BR><FONT face=Arial size=2>Basically our telco is presenting calls in
order of the ISDNs on our servers.</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial
size=2>SERVER1=1,2,3,4<BR>SERVER2=5,6,7,8</FONT></SPAN></DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial size=2>We have redundancy
in that if SERVER1 is shutdown then each ISDN PRI is in alarm and the calls will
then presented to PRIs 5,6,7,8 on SERVER2.<BR><BR>If I have to take SERVER1
offline for maintenance (asterisk -rx shutdown gracefully) any incoming
calls receive a BUSY tone.<BR><BR>What I would like to know is if there is
anyway to get around this and not send a BUSY back to our callers and somehow
allow our telco to present calls immediately to SERVER2.<BR><BR>Anyone have any
ideas or are we stuck with this behaviour until the calls drop to 0
and Asterisk shuts
down ?<BR><BR>Thanks,<BR>Andrew</FONT></SPAN></DIV>
<DIV><SPAN class=583264717-13022008><FONT face=Arial
size=2></FONT></SPAN> </DIV>
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