Chapter 1 Overview; Managed Services - Cisco MCS-7825-H3-IPC1 Service Manual

Supported Deployment Models
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Supported Deployment Models
Three types of Cisco Unified CM supported deployments exist—Single site, multisite WAN with
centralized call processing, and multisite WAN with distributed call processing. The following
paragraphs describe each of these:
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Cisco Unified CM BE 5000 supports three main types of deployment models—Single-site, multisite
WAN with centralized call processing, and multisite WAN deployment with distributed call processing.
Cisco Unified CM BE 5000 is a single-platform deployment, running both Cisco Unified CM and Cisco
Unity Connection on the same server. Each type is described in the following paragraphs:
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Cisco Unified Communications Manager Managed Services Guide
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Operations, administration, maintenance, and provisioning (OAM&P)
Programming interface to external voice-processing applications such as Cisco IP Communicator,
Cisco Unified IP Interactive Voice Response (IP IVR), and Cisco Unified Communications Manager
Attendant Console
Single Site—Consists of a call processing agent cluster that is located at a single site, or campus,
with no telephony services that are provided over an IP WAN. An enterprise would typically deploy
the single-site model over a LAN or metropolitan area network (MAN), which carries the voice
traffic within the site. In this model, calls beyond the LAN or MAN use the public switched
telephone network (PSTN).
Multisite WAN with Centralized Call Processing—Consists of a single call processing agent cluster
that provides services for many remote sites and uses the IP WAN to transport Cisco Unified
Communications traffic between the sites. The IP WAN also carries call control signaling between
the central site and the remote sites.
Multisite WAN with Distributed Call Processing—Consists of multiple independent sites, each with
its own call processing agent cluster that is connected to an IP WAN that carries voice traffic
between the distributed sites.
Single-Site—Consists of Cisco Unified CM and Cisco Unity Connection running on the same
hardware platform located at a single site or campus, with no telephony services provided over an
IP WAN.
Multisite WAN with Centralized Call Processing—Consists of a single call processing appliance
that provides services for up to 20 sites (one central site and 19 remote sites), and this model uses
the IP WAN to transport IP telephony traffic between the sites. The IP WAN also carries call control
signaling between the central site and the remote sites.
Multisite WAN with Distributed Call Processing—Consists of independent sites, each with its own
call processing agent connected to an IP WAN that carries voice traffic between the distributed sites.
The multisite WAN deployment with distributed call processing enables Cisco Unified CM BE 5000
to operate with Cisco Unified CM or other Cisco Unified CM BE 5000 deployments. With this
model, Cisco Unified CM BE 5000 supports the use of H.323 intercluster trunks as well as SIP
trunks to interconnect with Cisco Unified CM deployments or other Cisco Unified CM BE 5000
deployments. Each site can be a single site with its own call processing agent, a centralized call
processing site and all of its associated remote sites, or a legacy PBX with Voice over IP (VoIP)
gateway.
Chapter 1 Overview
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