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<div class=Section1>
<p class=MsoNormal>Here is a brief description of what I need, please send
comments to <a href="mailto:damon@soho-systems.com">damon@soho-systems.com</a><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We are looking for someone to give us a “quick
start” with SER.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We have a ”meshed” asterisk implementation with
multiple servers used as registration and feature servers. Everything is 100%
asterisk now.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We have an asterisk server as a front end DID router that
acts as a back to back user agent between the upstream carrier and feature
server of the end user. When a call comes in from upstream the front end box
does a database lookup (MySQL 5) to determine which feature server the user is
expected to be registered on and bridges the call to the feature server.
If the user is not registered voicemail or forwarding is handled by the feature
server , not front end.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>No outbound calls are handled by the front end box, and no
authentication other than trusted IP address is used by the upstream carriers.
There is no need for registration knowledge on the front end box.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>While this is working extremely well as is, we recognize the
scalability advantages that could be obtained with a true SIP proxy in the
front.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Here is what we would like SER to do;<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Accept invites from two or more upstream carriers,
trusted by IP address and not registered or authenticated in any other way<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Do a database query on the MySQL 5 database to
determine the IP address (or SIP URI) of the registration server the user is
expected to be on.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Proxy the SIP signaling between the upstream carrier
and the appropriate registration server.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>4.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Record the call record and result in a MySQL database
table<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>5.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Remain in the SIP signal path, but stay out of the RTP
path.<o:p></o:p></p>
<p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo2'><![if !supportLists]><span
style='mso-list:Ignore'>6.<span style='font:7.0pt "Times New Roman"'>
</span></span><![endif]>Return a 404 not found when there is no database match
for the DID in the database.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Initial Questions;<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Can SER look into a custom database table for routing
information on each call?<o:p></o:p></p>
<p class=MsoNormal>Can SER act as a stateful SIP proxy without the end user
registering on it?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Other information;<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Call volume is about 25,000 inbound calls per day.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We run 100% of our servers on Linux HA clusters of 2 nodes,
we do not need assistance with this portion of the setup as we are very well
versed in HA clustering, but it is important to know because during a failover
registration state would be lost and therefore static routing based on DB
queries is preferred.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We have extensive Asterisk experience, no Asterisk work is
required.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Base OS is CentOS 4.6<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>SER .9.x with the MySQL module has already been loaded, but
not configured<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Root SSH access can be provided<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>There is NO NAT involved, the upstream, the SER box, and all
asterisk feature server sue real IP addresses. Any NAT would be between the UA
and the feature server, and the feature server acts as a B2BUA and handles NAT
traversal. Calls would never be proxied to the UA directly, only to the feature
servers.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Please let me know you rate for this type of work, a rough
time estimate to do only the configuration of SER (no installing required),
your availability, and your past experience with similar implementation. This
is for an TSP service thousands of end users, it is a mission critical
implementation, so EXPERTS ONLY please.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>After successful testing plan on an hour or two to walk us
through the config and explain the routing logic.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We are in the GMT -7 mountain time zone, and English is our
only spoken language. We would prefer somebody who could be available during
this implementation during our regular business hours of 8AM to 6PM MST.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>We can pay via paypal if desired.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thanks!<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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