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<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>I am fairly new to Asterisk / VOIP and have been playing around with it
for long enough to have a whole lot of questions so far without answers.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>Presently I’m running Asterisk (v.1.0.7) on a Debian Sarge installation
with 2 soft phones (for testing purposes). A live deployment will probably have
a dozen-odd extensions. I wish to have both SIP and PSTN services exposed to
the outside and will probably install an appropriate Digium card to allow me to
connect PSTN lines. We pay ransom to Microsloth for our company network.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>I am reading that Asterisk does not provide SIP proxying services
however proxy services are “very important” (one reference said “critical”) to
routing in SIP as it provides for dynamic rewriting, redirection and
inter-domain routing. In Asterisk, how are these functions meant to work? As
far as I can tell, it cannot perform inter-domain routing as it has no proxying
capability but apparently provides redirection and rewriting services. Am I
going to require the services of SER (perhaps in a gateway role) in order to
achieve any or all of these functions or will Asterisk alone provide it? I have
been reading the SER documentation and it seems to be very capable however I
think that establishing the dial plan and voicemail in Asterisk may be a
simpler and clearer process. So my next question may be how are people
deploying Asterisk with a separate proxy server? Early on I was reading that a
proxy is mainly useful in a large environment (thousands of extensions) in
order to reduce the load on the Asterisk server however this doesn’t seem to
mesh with what I’m reading now about a proxy providing SIP routing services. <o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>To date, I have only been able to set up Asterisk with fixed extension
numbers with no facility for authenticating a particular user at a terminal. Being
able to tell Asterisk where a particular user is and direct calls to them is
one of the core capabilities of SIP and is one of the key reasons why we want
to deploy it into our office. Yet I’ve seen no documentation on how to do this.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>As you can probably gather, I’m rather confused about how to develop / deploy
a VOIP solution. There is much written about the topic however they seem to say
conflicting things…<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'><![if !supportEmptyParas]> <![endif]><o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>Any help would be appreciated.<o:p></o:p></span></font></span></p>
<p class=MsoNormal><span class=EmailStyle15><font size=2 color=black
face=Arial><span style='font-size:10.0pt;mso-bidi-font-size:12.0pt;font-family:
Arial'>Mike<o:p></o:p></span></font></span></p>
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