Cisco WS-X4604-GWY - VoIP Gateway Specifikace stáhnout pdf (Strana 75)

3-3

Cisco IP Telephony Network Design Guide

78-11103-03

Chapter 3 Cisco CallManager Clusters

Cluster Operation and Scalability Guidelines

The maximum number of registered devices per Cisco CallManager is 5000 in the

case of the MCS-7835, including a maximum of 2500 IP telephones, gateways,

and Digital Signaling Processor (DSP) devices such as transcoding and

conferencing resources. In the event of failure of one of the Cisco CallManagers

within the cluster, the maximum number of registered devices remains 5000 per

Cisco CallManager in the case of the MCS-7835.

Device Weights

Many types of devices can register with a Cisco CallManager. Each of these

resources—IP phones, voice mail ports, Telephony Application Programming

Interface (TAPI) devices, Java Telephony API (JTAPI) devices, gateways, and

DSP resources such as transcoding and conferencing—carries a different weight.

Table 3-2 shows the weight for each of the resource types, based on the

consumption of memory and CPU resources.

Table 3-2 Weights by Device Type

Device type

Weight per Session/

Voice Channel

Session/DS0

per Device

Cumulative

Device Weight

IP phone 1 1 1

Analog gateway ports 3 Varies 3 per DS0

T1 gateway 3 24 72 per T1

E1 gateway 3 30 90 per E1

Transcoding resource 3 Varies 3 per session

Software MTP 3 48 144

1. When installed on the same server as Cisco CallManager, the maximum number of sessions is 48.

Conference resource (hardware) 3 Varies 3 per session

Conference resource (software) 3 48 144

CTI port (TAPI and JTAPI) 20 1 20

Cisco SoftPhone 20 1 20

Messaging (voice mail) 3 Varies 3 per session

Intercluster trunk 3 Varies 3 per session

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 261 262

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Cisco WS-X4604-GWY - VoIP Gateway Specifikace Strana 75