[cisco-voip] Sizing Callmanager Server

[Reto Gassmann]

Hello
we run our Callmanager 4.2(3) on HP DL 380 G4 Servers (MCS-7854 H2). We have the
phones configured on two servers. So there are about 2550 Phones per server. If
one server fails the phones change to the other and the phones sum up to over
5000 phones on this single server.
In Service Parameters Configuration / Cisco CallManager I found an entry called
Maximum Number of Registered Devices* and the value is 5000. So what happens if
I have more than 5000 phones??

According to the SRND the 7845 can handle up to 7500 devices. Has any one an
experience what happens to this if I enable cluster security?

Thanks for help
Reto