Design Guide for the Cisco Unified Videoconferencing Solution Using Desktop Component, Release 5.6 - Selecting a Cisco Unified Videoconferencing Solution Deployment Topology [Cisco Unified Videoconferencing 3500 Series Products]

Table Of Contents

Selecting a Cisco Unified Videoconferencing Solution Deployment Topology

About Cisco Unified Videoconferencing Solution Deployments

About a Basic Deployment of the Cisco Unified Videoconferencing Solution

Basic Deployment Functionality

Basic Deployment Limitations

About a Small Centralized Deployment of the Cisco Unified Videoconferencing Solution

Small Centralized Deployment Functionality

Small Centralized Deployment Limitations

About a Large Centralized Deployment of the Cisco Unified Videoconferencing Solution

Large Centralized Deployment Functionality

Large Centralized Deployment Limitations

About a Large Distributed Single-Zone Deployment of the Cisco Unified Videoconferencing Solution

Large Distributed Single-zone Deployment Functionality

Large Distributed Single-zone Deployment Limitations

Selecting a Cisco Unified Videoconferencing Solution Deployment Topology

•About Cisco Unified Videoconferencing Solution Deployments

•About a Basic Deployment of the Cisco Unified Videoconferencing Solution

•About a Small Centralized Deployment of the Cisco Unified Videoconferencing Solution

•About a Large Centralized Deployment of the Cisco Unified Videoconferencing Solution

•About a Large Distributed Single-Zone Deployment of the Cisco Unified Videoconferencing Solution

About Cisco Unified Videoconferencing Solution Deployments

Deployments described in this chapter suit installations of the Desktop component of the Cisco Unified Videoconferencing Manager using only a single network interface card (NIC). However, the Desktop technology is designed to also handle advanced topologies involving dual-NIC deployments, which are described in Appendix B, "Configuring Dual-NIC Cisco Unified Videoconferencing Solution Deployments".

Deployments use these connections:

•Tunneled—The normal UDP or TCP ports used for the media or control are not open in the complete path from Desktop Client to Desktop Server allowing you to use either a limited UDP port or a TCP port or just HTTP. The media is repacketized to accommodate the open connection; in some instances the media is made compatible with HTTP in order to tunnel through open ports or proxy servers. For the real time media this means:

–For Desktop Client—SRTP/RTP/UDP traffic is tunneled through TCP or HTTP on port 80 or 443.

–For streaming—TCP port 7070 or port 80 is used for web access and control (port 80, 443 or 8080).

–For web access and conference control—TCP port 80, 443 or 8080 is used.

•Untunneled—The normal port ranges of operation for UDP or TCP are opened so that the Desktop Client or Desktop Server can communicate without repackaging or redirecting to alternate ports or protocol (UDP to TCP or HTTP).

About a Basic Deployment of the Cisco Unified Videoconferencing Solution

This is the most basic deployment available if the Desktop Server uses a single NIC card. This deployment is particularly attractive for small and medium enterprises having a single main site. This topology contains these solution components:

•Cisco Unified Videoconferencing Manager with the following components activated:

–Desktop

–Desktop Streaming Server

–Desktop Recording Server

–Internal Gatekeeper

Note•You must install the Desktop Streaming and Recording components on the same server which is used for the Desktop Server and Internal Gatekeeper installation.

•All components are installed but only the above components are required for this type of deployment, and are activated.

•Cisco Unified Videoconferencing 3500 Series MCU

The connection outside the enterprise is handled by the Desktop Client only.

Figure 1-1 Basic Deployment

Related Topics

•Basic Deployment Functionality

•Basic Deployment Limitations

Basic Deployment Functionality

'This solution supports conference participants belonging to the same enterprise. This deployment allows moderation of meetings using either the Desktop Client interface or the Conference Control interface of the Cisco Unified Videoconferencing 3500 Series MCU. The Desktop technology supports firewall and NAT traversal for Desktop connection via public networks.

Depending on the Cisco Unified Videoconferencing 3500 Series MCU model and configuration deployed, up to 92 desktops in Standard Definition (SD) mode, or up to 72 room systems in High Definition (HD) mode can participate in the same conference.

For example, when 1 Cisco Unified Videoconferencing 3500 Series MCU board operates with 3 EMP boards, you can connect up to

•48 room systems in HD mode

•72 rooms in SD mode

•96 desktops (in 2 conferences)

This solution also supports IP dialing to the Cisco Unified Videoconferencing 3500 Series MCU and the auto-attendance (video IVR) feature. The MCU IP address should be used for IP dialing into the auto-attendance (video IVR) systems.

To configure a firewall correctly for this deployment, see recommendations described in the "Configuring a Firewall" section on page 3-24.

Basic Deployment Limitations

Since the Resource Manager component of the Cisco Unified Videoconferencing Manager is not activated in this topology, features such as virtual rooms, automatic MCU cascading and conference scheduling are not supported. This topology has only one MCU component; therefore, a conference cannot span multiple MCUs. In this case automatic cascading is not possible.

About a Small Centralized Deployment of the Cisco Unified Videoconferencing Solution

This deployment suits medium and large networks, and provides this functionality:

•Uses a single Desktop Server together with multiple Cisco Unified Videoconferencing 3500 Series MCU components to connect desktop clients both inside and outside the corporate network.

•Connects room systems inside a corporate network.

•Conferencing solution for ISDN systems on the PSTN network using Cisco Unified Videoconferencing 3500 Series Gateways.

•Uses the Resource Manager component to provide scheduling, resource reservation, virtual MCU scalability across multiple MCUs.

•Support for IP dialing both from inside and outside the enterprise network.

•Support for auto-attendance (video IVR) which allows a participant to hear and view a list of conferences currently running on all MCUs and to join one of them.

Figure 1-2 Small Centralized Deployment

This deployment typically includes these components:

•Multiple Cisco Unified Videoconferencing 3500 Series MCU products—Located in the firewall-protected private network.

•Desktop Server—Located in the firewall-protected DMZ.

•Cisco Unified Videoconferencing Manager—Located in the firewall-protected DMZ. This component can be installed on the same server as Desktop or Cisco Streaming Server, or on separate dedicated servers for better performance and capacity.

•Internal Gatekeeper—in the firewall-protected network.

•Room videoconferencing systems

•Cisco Unified Videoconferencing 3500 Series Gateways

•ISDN videoconferencing endpoints on the PSTN/ISDN network

For this deployment, the Desktop and Streaming components of the Cisco Unified Videoconferencing Manager are typically installed on the same server as the Resource Manager component. The Cisco Unified Videoconferencing 3500 Series MCUs are located on the private network.

Related Topics

•Small Centralized Deployment Functionality

•Small Centralized Deployment Limitations

Small Centralized Deployment Functionality

The Desktop Server resides in the DMZ. The deployment supports:

•Desktop Clients both inside and outside the corporate network

•Room systems inside the corporate network

•Directory Server integration

•Video conference scheduling via web or Microsoft Outlook

•MCU resource reservation for scheduled conferences

•Virtualization of multiple-MCU deployments for seamless scalability

•Virtual rooms (reservationless personal video conference IDs)

•ISDN systems on the PSTN/ISDN network

•IP dialing from inside the enterprise network.

•Auto-attendance (video IVR) which enables to join any current conference.

•Up to 50 interactive Desktop connections and 150 live conference streams, simultaneously.

Note This is a limitation of s single Desktop Server, not of the MCU.

To configure a firewall correctly for this deployment, see recommendations described in "Configuring a Firewall" section on page 3-24.

Small Centralized Deployment Limitations

Because all components of Cisco Unified Videoconferencing Manager are installed in a single server in the DMZ, the maximum capacity achievable on supported Cisco Media Convergence Servers (MCS) is 50 simultaneous Desktop client connections and 150 simultaneous live conference streams. See Table 3 in the Cisco Unified Videoconferencing Manager data sheet for details on supported Cisco MCS servers and their capacities: http://cisco.com/en/US/prod/collateral/video/ps7190/ps7088/
product_data_sheet0900aecd8053684f.html.

About a Large Centralized Deployment of the Cisco Unified Videoconferencing Solution

This deployment suits large enterprises providing:

•Conferencing solution using multiple Desktop Servers together with multiple Cisco Unified Videoconferencing 3500 Series MCU components to provide scalable support of Desktop participants both inside and outside the corporate network.

•Conferencing solution for room systems inside the corporate network using the Internal Gatekeeper.

•Conferencing solution for ISDN systems on the PSTN network using Cisco Unified Videoconferencing 3500 Series Gateways.

Figure 1-3 Large Centralized Deployment

This deployment typically includes these components:

•Multiple Cisco Unified Videoconferencing 3500 Series MCU components—Located in the firewall-protected private network.

•Cisco Unified Videoconferencing Manager components:

–Desktop Servers—Multiple servers deployed in the firewall protected DMZ. The load from the Desktop participant connections is evenly distributed between the Desktop servers by a load balancer.

Note Additional Desktop Servers can be deployed for secure internal access.

–Streaming Server—Dedicated server for live streaming audience.

–Resource and Network Manager Server, including the Internal Gatekeeper—Providing the scheduling, resource reservations, virtualization of multiple MCUs, and network management of videoconferencing infrastructure.

–Desktop Recording Servers—Located in the firewall-protected DMZ.

•Cisco Unified Videoconferencing 3500 Series Gateway—Located on the firewall-protected private network.

•Room (H.323, SIP, SCCP) videoconferencing endpoints

•ISDN (H.320) videoconferencing endpoints on the PSTN/ISDN network

Note For optimal streaming scalability, we recommend installing the Streaming Server and the Desktop Recording Server components on a separate server. You can also deploy a Streaming Server and a Desktop Recording Server per each Desktop Server for enhanced scalability.

Related Topics

•Large Centralized Deployment Functionality

•Large Centralized Deployment Limitations

Large Centralized Deployment Functionality

The deployment supports Desktop participants both inside and outside the corporate network, and room systems inside the corporate network. The deployment also supports ISDN systems on the PSTN/ISDN network. Cisco Unified Videoconferencing Manager provides scheduling, resource reservation, network management, support of Directory Server integration and virtual rooms (reservationless personal videoconferencing IDs).

This deployment supports up to 50 simultaneous Desktop participant connections per Desktop Server deployed. It also supports up to 300 simultaneous live conference streaming viewers on the dedicated Streaming Server.

To configure a firewall correctly for this deployment, see recommendations described in "Configuring a Firewall" section on page 3-24.

Large Centralized Deployment Limitations

The deployment requires a load balancer. However, a load balancer is not necessary for using Desktop in the streaming mode. The chat and `raise hand' Desktop participant features do not function properly in deployments with multiple Desktop Servers. If multiple Desktop Servers are used in the same call, additional MCU ports are used. The IP dialing into auto-attendance (video IVR) systems is supported for internal network H.323 systems only.

About a Large Distributed Single-Zone Deployment of the Cisco Unified Videoconferencing Solution

This deployment suits large multi-site enterprises providing:

•Conferencing solution using multiple Desktop Servers with multiple Cisco Unified Videoconferencing 3500 Series MCU and EMP systems for each location to provide scalable Desktop Clients both inside and outside the corporate network.

•Support for multiple Desktop Clients both inside and outside the corporate network, and room systems inside the corporate network.

•Conferencing solution for ISDN systems on the PSTN network using Cisco Unified Videoconferencing 3500 Series Gateway.

•Bandwidth and conferencing resources management solution using Cisco Unified Videoconferencing Manager.

•IP dialing support and enterprise-wide auto-attendance (video IVR).

Figure 1-4 shows the large distributed single-zone Cisco Unified Videoconferencing Solution deployment.

Figure 1-4 Large Distributed Single-zone Deployment

This deployment typically includes the following components:

•Multiple Cisco Unified Videoconferencing 3500 Series MCU and EMP components—Located on the firewall-protected enterprise network.

•Desktop Servers—Located on firewall-protected enterprise network, each branch office is equipped with Desktop Servers to provide Desktop Client services coverage to the specific geographical area.

•Desktop Servers—Located on the firewall-protected enterprise network for enterprise users, or in the DMZ to allow external users to connect. Each branch office is equipped with Desktop Servers to provide Desktop Client services coverage to the specific geographical area.

•Cisco Unified Videoconferencing Manager—Located on the firewall-protected enterprise network at the headquarters site.

•Alternate Cisco IOS H.323 Gatekeeper—Located on the firewall-protected enterprise network in the HQ.

•Cisco Unified Videoconferencing 3500 Series Gateway—Located on the firewall-protected enterprise network, each branch office is equipped with Cisco Unified Videoconferencing 3500 Series Gateway to provide ISDN room system services coverage to the specific geographical area.

•Internal Enterprise Room systems

•ISDN endpoints on the PSTN/ISDN network

Related Topics

•Large Distributed Single-zone Deployment Functionality

•Large Distributed Single-zone Deployment Limitations

Large Distributed Single-zone Deployment Functionality

The large distributed single-zone deployment consists of a headquarters site and several remote sites which are referred to as "islands". Cisco Unified Videoconferencing Manager situated at the headquarters site is used to manage all deployment components and resources in agreement with the network topology configuration. For example, if a video conference is created on island A, users from island B can join the conference using the island B Cisco Unified Videoconferencing 3500 Series MCU, because Cisco Unified Videoconferencing Manager can manage cascading between island A MCU and island B MCU, allowing the users to seamlessly join the conference.

While a Desktop conference is created at Desktop Server located on one of the islands, users from any island in the topology can connect to it due to Cisco Unified Videoconferencing Manager resource management.

Cisco Unified Videoconferencing Manager provides support for Directory Server integration and virtual rooms of multi-site enterprises.

This deployment supports up to 96 room systems per every MCU deployed or up to 200 Desktop Server Clients per Desktop Server.

This deployment assumes that islands are interconnected using a third-party VPN solution. Islands which are connected to unprotected public network, such as Internet, must be protected by a firewall.

Related Topics

•Configuring a Firewall, page 3-24

Large Distributed Single-zone Deployment Limitations

A single-zone dial plan must be used since this deployment supports only the single H.323 zone topology.

	Design Guide for the Cisco Unified Videoconferencing Solution Using Desktop Component, Release 5.6
	Selecting a Cisco Unified Videoconferencing Solution Deployment Topology
Design Guide for the Cisco Unified Videoconferencing Solution Using Desktop Component, Release 5.6 Selecting a Cisco Unified Videoconferencing Solution Deployment Topology Installing and Upgrading Desktop Components of the Cisco Unified Videoconferencing Manager Configuring Cisco Unified Videoconferencing Solution Components Testing Your Cisco Unified Videoconferencing Solution Deployment Configuring Desktop Server for HTTPS Configuring Dual-NIC Cisco Unified Videoconferencing Solution Deployments Configuring Cisco Unified Videoconferencing Manager Prefix Firewall and NAT Rules for the Cisco Unified Videoconferencing Solution	Download this chapter Selecting a Cisco Unified Videoconferencing Solution Deployment Topology Download the complete book Design Guide for the Cisco Unified Videoconferencing Solution Using Desktop Component, Release 5.6 (PDF - 800 KB) Table Of Contents Selecting a Cisco Unified Videoconferencing Solution Deployment Topology About Cisco Unified Videoconferencing Solution Deployments About a Basic Deployment of the Cisco Unified Videoconferencing Solution Basic Deployment Functionality Basic Deployment Limitations About a Small Centralized Deployment of the Cisco Unified Videoconferencing Solution Small Centralized Deployment Functionality Small Centralized Deployment Limitations About a Large Centralized Deployment of the Cisco Unified Videoconferencing Solution Large Centralized Deployment Functionality Large Centralized Deployment Limitations About a Large Distributed Single-Zone Deployment of the Cisco Unified Videoconferencing Solution Large Distributed Single-zone Deployment Functionality Large Distributed Single-zone Deployment Limitations Selecting a Cisco Unified Videoconferencing Solution Deployment Topology •About Cisco Unified Videoconferencing Solution Deployments •About a Basic Deployment of the Cisco Unified Videoconferencing Solution •About a Small Centralized Deployment of the Cisco Unified Videoconferencing Solution •About a Large Centralized Deployment of the Cisco Unified Videoconferencing Solution •About a Large Distributed Single-Zone Deployment of the Cisco Unified Videoconferencing Solution About Cisco Unified Videoconferencing Solution Deployments Deployments described in this chapter suit installations of the Desktop component of the Cisco Unified Videoconferencing Manager using only a single network interface card (NIC). However, the Desktop technology is designed to also handle advanced topologies involving dual-NIC deployments, which are described in Appendix B, "Configuring Dual-NIC Cisco Unified Videoconferencing Solution Deployments". Deployments use these connections: •Tunneled—The normal UDP or TCP ports used for the media or control are not open in the complete path from Desktop Client to Desktop Server allowing you to use either a limited UDP port or a TCP port or just HTTP. The media is repacketized to accommodate the open connection; in some instances the media is made compatible with HTTP in order to tunnel through open ports or proxy servers. For the real time media this means: –For Desktop Client—SRTP/RTP/UDP traffic is tunneled through TCP or HTTP on port 80 or 443. –For streaming—TCP port 7070 or port 80 is used for web access and control (port 80, 443 or 8080). –For web access and conference control—TCP port 80, 443 or 8080 is used. •Untunneled—The normal port ranges of operation for UDP or TCP are opened so that the Desktop Client or Desktop Server can communicate without repackaging or redirecting to alternate ports or protocol (UDP to TCP or HTTP). About a Basic Deployment of the Cisco Unified Videoconferencing Solution This is the most basic deployment available if the Desktop Server uses a single NIC card. This deployment is particularly attractive for small and medium enterprises having a single main site. This topology contains these solution components: •Cisco Unified Videoconferencing Manager with the following components activated: –Desktop –Desktop Streaming Server –Desktop Recording Server –Internal Gatekeeper Note•You must install the Desktop Streaming and Recording components on the same server which is used for the Desktop Server and Internal Gatekeeper installation. •All components are installed but only the above components are required for this type of deployment, and are activated. •Cisco Unified Videoconferencing 3500 Series MCU The connection outside the enterprise is handled by the Desktop Client only. Figure 1-1 Basic Deployment Related Topics •Basic Deployment Functionality •Basic Deployment Limitations Basic Deployment Functionality 'This solution supports conference participants belonging to the same enterprise. This deployment allows moderation of meetings using either the Desktop Client interface or the Conference Control interface of the Cisco Unified Videoconferencing 3500 Series MCU. The Desktop technology supports firewall and NAT traversal for Desktop connection via public networks. Depending on the Cisco Unified Videoconferencing 3500 Series MCU model and configuration deployed, up to 92 desktops in Standard Definition (SD) mode, or up to 72 room systems in High Definition (HD) mode can participate in the same conference. For example, when 1 Cisco Unified Videoconferencing 3500 Series MCU board operates with 3 EMP boards, you can connect up to •48 room systems in HD mode •72 rooms in SD mode •96 desktops (in 2 conferences) This solution also supports IP dialing to the Cisco Unified Videoconferencing 3500 Series MCU and the auto-attendance (video IVR) feature. The MCU IP address should be used for IP dialing into the auto-attendance (video IVR) systems. To configure a firewall correctly for this deployment, see recommendations described in the "Configuring a Firewall" section on page 3-24. Basic Deployment Limitations Since the Resource Manager component of the Cisco Unified Videoconferencing Manager is not activated in this topology, features such as virtual rooms, automatic MCU cascading and conference scheduling are not supported. This topology has only one MCU component; therefore, a conference cannot span multiple MCUs. In this case automatic cascading is not possible. About a Small Centralized Deployment of the Cisco Unified Videoconferencing Solution This deployment suits medium and large networks, and provides this functionality: •Uses a single Desktop Server together with multiple Cisco Unified Videoconferencing 3500 Series MCU components to connect desktop clients both inside and outside the corporate network. •Connects room systems inside a corporate network. •Conferencing solution for ISDN systems on the PSTN network using Cisco Unified Videoconferencing 3500 Series Gateways. •Uses the Resource Manager component to provide scheduling, resource reservation, virtual MCU scalability across multiple MCUs. •Support for IP dialing both from inside and outside the enterprise network. •Support for auto-attendance (video IVR) which allows a participant to hear and view a list of conferences currently running on all MCUs and to join one of them. Figure 1-2 Small Centralized Deployment This deployment typically includes these components: •Multiple Cisco Unified Videoconferencing 3500 Series MCU products—Located in the firewall-protected private network. •Desktop Server—Located in the firewall-protected DMZ. •Cisco Unified Videoconferencing Manager—Located in the firewall-protected DMZ. This component can be installed on the same server as Desktop or Cisco Streaming Server, or on separate dedicated servers for better performance and capacity. •Internal Gatekeeper—in the firewall-protected network. •Room videoconferencing systems •Cisco Unified Videoconferencing 3500 Series Gateways •ISDN videoconferencing endpoints on the PSTN/ISDN network For this deployment, the Desktop and Streaming components of the Cisco Unified Videoconferencing Manager are typically installed on the same server as the Resource Manager component. The Cisco Unified Videoconferencing 3500 Series MCUs are located on the private network. Related Topics •Small Centralized Deployment Functionality •Small Centralized Deployment Limitations Small Centralized Deployment Functionality The Desktop Server resides in the DMZ. The deployment supports: •Desktop Clients both inside and outside the corporate network •Room systems inside the corporate network •Directory Server integration •Video conference scheduling via web or Microsoft Outlook •MCU resource reservation for scheduled conferences •Virtualization of multiple-MCU deployments for seamless scalability •Virtual rooms (reservationless personal video conference IDs) •ISDN systems on the PSTN/ISDN network •IP dialing from inside the enterprise network. •Auto-attendance (video IVR) which enables to join any current conference. •Up to 50 interactive Desktop connections and 150 live conference streams, simultaneously. Note This is a limitation of s single Desktop Server, not of the MCU. To configure a firewall correctly for this deployment, see recommendations described in "Configuring a Firewall" section on page 3-24. Small Centralized Deployment Limitations Because all components of Cisco Unified Videoconferencing Manager are installed in a single server in the DMZ, the maximum capacity achievable on supported Cisco Media Convergence Servers (MCS) is 50 simultaneous Desktop client connections and 150 simultaneous live conference streams. See Table 3 in the Cisco Unified Videoconferencing Manager data sheet for details on supported Cisco MCS servers and their capacities: http://cisco.com/en/US/prod/collateral/video/ps7190/ps7088/ product_data_sheet0900aecd8053684f.html. About a Large Centralized Deployment of the Cisco Unified Videoconferencing Solution This deployment suits large enterprises providing: •Conferencing solution using multiple Desktop Servers together with multiple Cisco Unified Videoconferencing 3500 Series MCU components to provide scalable support of Desktop participants both inside and outside the corporate network. •Conferencing solution for room systems inside the corporate network using the Internal Gatekeeper. •Conferencing solution for ISDN systems on the PSTN network using Cisco Unified Videoconferencing 3500 Series Gateways. Figure 1-3 Large Centralized Deployment This deployment typically includes these components: •Multiple Cisco Unified Videoconferencing 3500 Series MCU components—Located in the firewall-protected private network. •Cisco Unified Videoconferencing Manager components: –Desktop Servers—Multiple servers deployed in the firewall protected DMZ. The load from the Desktop participant connections is evenly distributed between the Desktop servers by a load balancer. Note Additional Desktop Servers can be deployed for secure internal access. –Streaming Server—Dedicated server for live streaming audience. –Resource and Network Manager Server, including the Internal Gatekeeper—Providing the scheduling, resource reservations, virtualization of multiple MCUs, and network management of videoconferencing infrastructure. –Desktop Recording Servers—Located in the firewall-protected DMZ. •Cisco Unified Videoconferencing 3500 Series Gateway—Located on the firewall-protected private network. •Room (H.323, SIP, SCCP) videoconferencing endpoints •ISDN (H.320) videoconferencing endpoints on the PSTN/ISDN network Note For optimal streaming scalability, we recommend installing the Streaming Server and the Desktop Recording Server components on a separate server. You can also deploy a Streaming Server and a Desktop Recording Server per each Desktop Server for enhanced scalability. Related Topics •Large Centralized Deployment Functionality •Large Centralized Deployment Limitations Large Centralized Deployment Functionality The deployment supports Desktop participants both inside and outside the corporate network, and room systems inside the corporate network. The deployment also supports ISDN systems on the PSTN/ISDN network. Cisco Unified Videoconferencing Manager provides scheduling, resource reservation, network management, support of Directory Server integration and virtual rooms (reservationless personal videoconferencing IDs). This deployment supports up to 50 simultaneous Desktop participant connections per Desktop Server deployed. It also supports up to 300 simultaneous live conference streaming viewers on the dedicated Streaming Server. To configure a firewall correctly for this deployment, see recommendations described in "Configuring a Firewall" section on page 3-24. Large Centralized Deployment Limitations The deployment requires a load balancer. However, a load balancer is not necessary for using Desktop in the streaming mode. The chat and `raise hand' Desktop participant features do not function properly in deployments with multiple Desktop Servers. If multiple Desktop Servers are used in the same call, additional MCU ports are used. The IP dialing into auto-attendance (video IVR) systems is supported for internal network H.323 systems only. About a Large Distributed Single-Zone Deployment of the Cisco Unified Videoconferencing Solution This deployment suits large multi-site enterprises providing: •Conferencing solution using multiple Desktop Servers with multiple Cisco Unified Videoconferencing 3500 Series MCU and EMP systems for each location to provide scalable Desktop Clients both inside and outside the corporate network. •Support for multiple Desktop Clients both inside and outside the corporate network, and room systems inside the corporate network. •Conferencing solution for ISDN systems on the PSTN network using Cisco Unified Videoconferencing 3500 Series Gateway. •Bandwidth and conferencing resources management solution using Cisco Unified Videoconferencing Manager. •IP dialing support and enterprise-wide auto-attendance (video IVR). Figure 1-4 shows the large distributed single-zone Cisco Unified Videoconferencing Solution deployment. Figure 1-4 Large Distributed Single-zone Deployment This deployment typically includes the following components: •Multiple Cisco Unified Videoconferencing 3500 Series MCU and EMP components—Located on the firewall-protected enterprise network. •Desktop Servers—Located on firewall-protected enterprise network, each branch office is equipped with Desktop Servers to provide Desktop Client services coverage to the specific geographical area. •Desktop Servers—Located on the firewall-protected enterprise network for enterprise users, or in the DMZ to allow external users to connect. Each branch office is equipped with Desktop Servers to provide Desktop Client services coverage to the specific geographical area. •Cisco Unified Videoconferencing Manager—Located on the firewall-protected enterprise network at the headquarters site. •Alternate Cisco IOS H.323 Gatekeeper—Located on the firewall-protected enterprise network in the HQ. •Cisco Unified Videoconferencing 3500 Series Gateway—Located on the firewall-protected enterprise network, each branch office is equipped with Cisco Unified Videoconferencing 3500 Series Gateway to provide ISDN room system services coverage to the specific geographical area. •Internal Enterprise Room systems •ISDN endpoints on the PSTN/ISDN network Related Topics •Large Distributed Single-zone Deployment Functionality •Large Distributed Single-zone Deployment Limitations Large Distributed Single-zone Deployment Functionality The large distributed single-zone deployment consists of a headquarters site and several remote sites which are referred to as "islands". Cisco Unified Videoconferencing Manager situated at the headquarters site is used to manage all deployment components and resources in agreement with the network topology configuration. For example, if a video conference is created on island A, users from island B can join the conference using the island B Cisco Unified Videoconferencing 3500 Series MCU, because Cisco Unified Videoconferencing Manager can manage cascading between island A MCU and island B MCU, allowing the users to seamlessly join the conference. While a Desktop conference is created at Desktop Server located on one of the islands, users from any island in the topology can connect to it due to Cisco Unified Videoconferencing Manager resource management. Cisco Unified Videoconferencing Manager provides support for Directory Server integration and virtual rooms of multi-site enterprises. This deployment supports up to 96 room systems per every MCU deployed or up to 200 Desktop Server Clients per Desktop Server. This deployment assumes that islands are interconnected using a third-party VPN solution. Islands which are connected to unprotected public network, such as Internet, must be protected by a firewall. Related Topics •Configuring a Firewall, page 3-24 Large Distributed Single-zone Deployment Limitations A single-zone dial plan must be used since this deployment supports only the single H.323 zone topology.
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