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Edgewater Networks 4300T Manuel d'utilisateur Page 1

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EAN0105-01
Contents
• Introduction
• Key benefits and features of VoIP survivability
• Example network topologies
o Enterprise
o Service Provider
• How survivability works
o Fallback mode and local call switching
o Support for redundant call processing servers (IP PBX or Softswitch)
• Platform support
• Configuring VoIP survivability in EdgeMarc appliances
Introduction
The high availability of voice services is a fundamental requirement for enterprises deploying their
own IP telephony equipment or subscribing to hosted VoIP services. In both cases providing
reliable communications to remote branch offices is costly usually involving the installation of local
call processing servers or additional wide area network (WAN) links to these locations.
Edgewater’s VoIP survivability enhances the reliability of VoIP services to branch offices in a cost
effective manner by providing local call switching in the event of WAN link failures or a loss of
connectivity to network based call processing servers. VoIP survivability is an orderable software
option for Edgewater’s EdgeMarc Series appliances. EdgeMarc appliances are flexible networking
devices that can also be configured to provide IP routing, optional T1 WAN link termination, resolve
NAT/firewall traversal problems, ensure high quality voice using QoS, monitor voice call quality and
provide comprehensive security for the LAN using a VoIP and data firewall.
Key benefits and features of VoIP survivability
Edgewater’s VoIP survivability offers the following important benefits:
• Continuity of voice services to branch offices during WAN link failures or failures in network
based call processing servers
• Significant savings over alternative solutions requiring redundant call processing servers or
multiple WAN links
• Simplified design that is easier to manage than alternative solutions requiring maintenance
of multiple dial plans in distributed call processing servers and complex routing
Survivability features:
• Application layer based monitoring of call processing servers to determine connectivity
• Automatic detection of loss of connectivity to call processing servers caused by WAN link
failures, network congestion or call processing server software failure
• Automatic return of call control to network based call processing servers once connectivity
has been restored
• Configurable timers to determine call processing server connectivity
• Call processing server connectivity status indicators
• Support for multiple call processing servers using DNS
Application Note
Configuring VoIP Survivability
In EdgeMarc Appliances
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Résumé du contenu

Page 1 - Application Note

Page 1 of 6EAN0105-01Contents• Introduction• Key benefits and features of VoIP survivability• Example network topologieso Enterpriseo Service Pro

Page 2 - Example network topologies

Page 2 of 6EAN0105-01• Reporting of the currently active call processing server in environments using multiple callprocessing servers• Local call sw

Page 3 - Platform support

Page 3 of 6EAN0105-01How survivability worksThe EdgeMarc appliance automatically creates a local dialing plan by monitoring the registrationrequests s

Page 4 - EAN0105-01

Page 4 of 6EAN0105-01Configuring VoIP survivability in EdgeMarc appliancesConfiguring VoIP survivability in EdgeMarc appliances consists of the follow

Page 5

Page 5 of 6EAN0105-01The reachability settings are used to determine when the EdgeMarc appliance provides local callswitching by entering fallback mod

Page 6

Page 6 of 6EAN0105-01Step 4 - Configure the IP address of the local LAN side PSTN gateway (optional)This step should be used if you have installed a P

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Voir le document Edgewater Networks 4300T Manuel d'utilisateur
Edgewater Networks 4300T Manuel d'utilisateur (51 pages)
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