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New Member

Device Loads on CallManger Cluster

I am looking for a document (that I have seen in the past) regarding device loads that are put on a CCM cluster. I need to know more than you can have 7500 phones on a CallManger Cluster, etc. I saw a document that broke down a little more like:

TSP port is equivalent to 5 IP Phones

Skinny devices are equal to 3 IP Phones.

Soft Phone is equal to 3 IP Phones.

Etc. We are trying to determine the amount of devices that can be placed on a CallManager cluster before adding another CallManger.


New Member

Re: Device Loads on CallManger Cluster

See if Chapter 6 of the SRND for 3.1 and 3.2 helps.


New Member

Re: Device Loads on CallManger Cluster


The answer to the question raise dis not a on document anser.

You have different platfrm wtih different max phone support with respect to the memory, device wiegths and multiple line appearance on the each phoone.

1. for 7825 you have a maximum phone of 1000

1000 lines supported per server/4000 lines per cluster

This value may change as you add other devices whose device weight need to be consider for the total device weight of 2000 available for 7825

2. for 7835 you have a maximum phone of 2500 and a total device weight of 5000 units

3.for 7845 you have a maximum phone of 7500 and atotal device wight of 10000 units.

Please see this url posted above to see how device weight affect the number of phone that can be configured on a server.

Also note that If you planning for redundancy within a cluster then you can use all the available device capapcity of the CCM and you need to leave room for failover of oither device. This would also affect the number of servers to use.



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