<br><tt><font size=2>I might be able to help with this as I've been working
with Cisco on this very discussion for weeks. </font></tt>
<br>
<br><tt><font size=2>I'm using v7.x on 5 Clusters. I too read that
these 7845 servers can support 7500 phones per server and 30,000 phones
per cluster. Cisco told me that this is true in a perfect world</font></tt>
<br><tt><font size=2>but Call Center agents use CTI and 500 agents is the
max per server with 2000 agents max per cluster. I freaked out because
thats a 15:1 ratio. </font></tt>
<br>
<br><tt><font size=2>Another thing Cisco came back with is that if these
agents use CVP and don't use an IP IVR then that number doubles to 1000
agents per server and 4000 agents per cluster.</font></tt>
<br>
<br><tt><font size=2>A little better but as Wes said, a massive performance
hit.</font></tt>
<br>
<br><tt><font size=2>Here's more info:</font></tt>
<br><a href=http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/ipcc_enterprise/srnd/75/c7ccmsrv.html#wp1061120><font size=3 color=blue face="Calibri"><u>http://www.cisco.com/en/US/docs/voice_ip_comm/cust_contact/contact_center/ipcc_enterprise/srnd/75/c7ccmsrv.html#wp1061120</u></font></a>
<br>
<br><font size=3 face="Arial">In a deployment with Unified CM 7.0 and Unified
CVP (no IP IVR), each Unified CM cluster (four primary and four backup
subscriber servers) can support up to about 4,000 Unified CCE agents. This
limit assumes that the BHCA call load and all configured devices are spread
equally among the eight call processing servers with 1:1 redundancy. (See
</font><font size=3 color=#002f80 face="Arial"><u>Unified CM Redundancy</u></font><font size=3 face="Arial">,
for redundancy schemes.) Each of the eight Unified CM servers (MCS-7845-H2/I2
or later High Performance Servers) would support a maximum of 500 agents.
In a failover scenario, the primary server would support a maximum of 1,000
agents. These capacities can vary, depending on your specific deployment.
All deployments must be sized by using the Cisco Unified CM Capacity Tool
or the Unified Communications Sizing Tool.</font>
<br>
<br>
<br>
<br><tt><font size=2>Date: Wed, 10 Mar 2010 09:47:48 -0500 (EST)<br>
From: Lelio Fulgenzi <lelio@uoguelph.ca><br>
To: Wes Sisk <wsisk@cisco.com><br>
Cc: cisco-voip@puck.nether.net<br>
Subject: Re: [cisco-voip] Phone limits per server<br>
Message-ID:<br>
<1338453699.2032011268232468344.JavaMail.root@simcoe.cs.uoguelph.ca><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
When you say massive performance hit, what do you mean? Just a rough guess.
<br>
<br>
Case in point, we have Unity Express boxes, IPCCx boxes. Does each CTI
port shave the load capacity down by 100 phones or something? <br>
<br>
We also have a Cistera appliance that uses CTI super provider to monitor
all 8000 phones or so. <br>
</font></tt>
<br><font size=2 face="sans-serif"><br>
Steve Siltman<br>
Senior Network Engineer - Cisco CCVP<br>
</font>
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