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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi Amish,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>The main advantage of the client/server relation ship between
the DiaStar server and the Asterisk client is to be able to provide a distributed
system where it is possible to separate the signaling and network connections
(DiaStar) from the application services. (Asterisk) This is an advantage for
larger systems. Multiple standard, easily built Asterisk boxes can added or
removed on the fly without any adjustments to DiaStar. There’s a clean
separation between the application and network connectivity.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>While, as you point out, it may be possible to be more
efficient by moving M3UA to the Asterisk systems, our base SS7 products (Dialogic
Distributed Signaling Interface or DSI) do not allow this. The various SS7
components that make up SIGTRAN/ISUP operate as separate processes communicating
by means of Unix message queues. They are controlled by a master process that reads
the SS7 configuration and then starts up the needed stacks on the single
system. DiaStar uses DSI, so we have to live within its constraints.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>So, rather than dividing work load based on routing contexts
or keys, call distribution to multiple Asterisk systems is done by means of a “who’s
least busy and replies first” to the server’s request for someone
to handle an inbound call. A “Hello” message is sent from DiaStar,
via Woomera, (the protocol used between Asterisk and DiaStar) to all Asterisk
systems that have registered with the server. The Asterisk system who replies
first (presumably the least busy system) will be granted the call. We think
this is a reasonable way of call distribution.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
<p class=MsoNormal><st1:PersonName w:st="on"><font size=3 color=navy
face=Arial><span lang=EN-GB style='font-size:12.0pt;font-family:Arial;
color:navy'>John Hermanski</span></font></st1:PersonName></u1:PersonName><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=gray face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:gray'>Technical Marketing
Engineer</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 color=gray face="Times New Roman"><span
lang=EN-GB style='font-size:12.0pt;color:gray'><br>
</span></font><font color=gray face=Arial><span lang=EN-GB style='font-family:
Arial;color:gray'>Dialogic Inc.<br>
</span></font><st1:Street w:st="on"><st1:address w:st="on"><font size=2
color=gray face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:
Arial;color:gray'>5 Monroe St</span></font></st1:address></st1:Street><font
size=2 color=gray face=Arial><span lang=EN-GB style='font-size:10.0pt;
font-family:Arial;color:gray'>.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=gray face=Arial><span lang=IT
style='font-size:10.0pt;font-family:Arial;color:gray'>Salem, MA<br>
<u1:place u2:st="on"><u1:country-region u2:st="on">USA</u1:country-region></u1:place><br>
<br>
Tel: </span></font><font size=2 color=navy
face=Arial><span lang=IT style='font-size:10.0pt;font-family:Arial;color:navy'>978
744 9098<br>
</span></font><font size=2 color=gray face=Arial><span lang=IT
style='font-size:10.0pt;font-family:Arial;color:gray'>Cell:
</span></font><font size=2 color=navy face=Arial><span lang=IT
style='font-size:10.0pt;font-family:Arial;color:navy'>978 836 8028<br>
</span></font><font size=2 color=gray face=Arial><span lang=IT
style='font-size:10.0pt;font-family:Arial;color:gray'>Email: </span></font><font
size=2 color=gray face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:gray'><a href="mailto:john.hermanski@dialogic.com"><span lang=IT>john.hermanski@dialogic.com</span></a></span></font><span
lang=IT><o:p></o:p></span></p>
<p class=MsoNormal><font size=2 color=gray face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:gray'>Web:</span></font><font
size=2 face=Arial><span lang=EN-GB style='font-size:10.0pt;font-family:Arial'>
<font color=navy><span style='color:navy'><a href="http://www.dialogic.com/">www.dialogic.com</a></span></font></span></font><o:p></o:p></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:navy'> <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=gray face=Arial><span lang=EN-GB
style='font-size:10.0pt;font-family:Arial;color:gray'>This e-mail is intended
only for the named recipient(s) and may contain information that is privileged,
confidential and/or exempt from disclosure under applicable law. No waiver of
privilege, confidence or otherwise is intended by virtue of communication via
the internet. Any unauthorized use, dissemination or copying is strictly
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recipient, please immediately notify the sender and destroy all copies of this
e-mail.</span></font><o:p></o:p></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
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