If you are planning to deploy a lot of these setups you should ask your SE about the phone proxy product.<br><br><a href="http://www.cisco.com/en/US/products/ps7057/index.html">http://www.cisco.com/en/US/products/ps7057/index.html
</a><br><br><br><br><div><span class="gmail_quote">On 10/25/06, <b class="gmail_sendername">Steve Miller</b> <<a href="mailto:millerman1@cox.net">millerman1@cox.net</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div bgcolor="#ffffff">
<div><font face="Arial" size="2">The following is information that I have rec'd
regarding the installation of a 7961 at someone's house who is using cable or
DSL. Is there anything else that we might need to think about? Thank
you!</font></div>
<div><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"></span></font> </div>
<div><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">Notes from Cisco
Engineer:</span></font></div>
<div><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"></span></font> </div>
<div><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">The remote equipment at
the home office would consist of a Cisco 871 router and a Cisco phone with a
power block. The Cisco 871 would function as the home office's firewall
and router (and would connect to either a cable modem or a DSL modem depending
on the site). The router would be configured to have an IPSec tunnel back
to the office network (most likely configured off of your existing
concentrator). The remote Cisco 871 would be configured with DHCP and have
the TFTP scope option set to tell all devices the IP address of the Call Manager
server (note the router has a built-in four port switch).</span></font></div>
<div>
<div>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
At that point, the IP
Phone would register normally to the Call Manager servers using the IPSec tunnel
as it's communication path. The keepalives from the phone to the CM
servers would keep the IPSec tunnel up and running
24/7.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
The restrictions on
this type of deployment are:</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
-must use G729 codec due to bandwidth restrictions</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
-extremely limited QoS control since we are going across the
Internet</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
-security policies need to be visited since the remote office would have access
to the corporate internal network (this one is a
biggie)</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
-sub-issue regarding calling from home office to home office. This is
doable but adds additional security and deployment
issues.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">
-need to consider the standard IT management overhead associated with supporting
home equipment.</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"></span></font> </p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;">Thank
you!</span></font></p>
<p><font color="navy" face="Arial" size="2"><span style="font-size: 10pt; color: navy; font-family: Arial;"> </span></font></p></div></div></div>
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