What is meant by "Weight limit per Call Manager"?

[limleeheng]

Hi,

What is meant by the above? Does it mean the maximum number of IP phone supported per Call Manager which is 2500?

Thanks a lot!

Regards,

Ron

[Brandon Buffin]

Per Cisco:

Device Limitation on the CallManager

The capabilities of the Cisco CallManager are based on the available CPU and memory resources. Each configured device has a "weight", which consumes a set amount of these resources. Devices such as gateways, conference resources, voice mail, and other applications consume device units based on their relative device weights. Weights for IP phone, DS0 port, transcoding resource, conference resource, TAPE and JTAPI are 1, 3, 3, 3, 20, and 20 respectively. The total device units of all devices configured cannot exceed the maximum device units that the Cisco Media Convergence Server (MCS) can support.

Hope this helps.

Brandon

[limleeheng]

Hi,

How about tagging the existing question by adding in aspect of IP Phone?

What is meant by "Weight limit per Call Manager in aspect of IP Phone"?

Thank you.

Regards,

Ron

[Brandon Buffin]

The weight for an IP phone is 1 (except softphone/IP Communicator). Phone weights along with gateways, CTI ports, etc. go into the weight limit. I understand that there is a CallManager Capacity Planning Tool available to partners now that more accurately sizes the CCM installation for your needs.

Brandon

[mparekh]

The following link provides the weight associated with different devices:

http://www.ciscotaccc.com/voice/showcase?case=K10100395

[Foremancr]

After searching for a while I fell that I have found the answer. http://www.cisco.com/en/US/docs/voice_ip_comm/cucm/srnd/3_3/cm33srnd.pdf

There is a statement part way down the page that said:

For example, MCS 7835 servers have a total server limit of 5000 device weight units

and 2500 IP phones. In a 1:1 redundancy pair, you can split the load between the two subscribers,

configuring each subscriber with 2500 device weight units and 1250 IP phones.