Voice Over Ip
Introduction
Organizations moving to VoIP technology for its flexibility and cost benefits must ensure that the underlying network infrastructure is ready to support high quality voice and protect IP PBX systems, phones and user traffic against threats and misuse.
VoIP traffic requirements vary significantly from traditional data traffic requirements, with VoIP much more sensitive to network congestion and delay. Infrastructures supporting VoIP must be able to perform the following functions:
- Prioritize voice traffic and optimize bandwidth use for high-quality delivery
- Keep active calls up, even during unexpected network events
- Defend against security threats at both the media and signaling layers to secure each call and VoIP system
- Extend VoIP capabilities to remote users where needed
Juniper Networks meets these requirements with a complete VoIP network infrastructure solution. It works with any IP PBX to broadly optimize VoIP traffic throughout your network.
Description
Real-time applications, including VoIP, place requirements on the network infrastructure that go far beyond the needs of simple best-effort IP transport.
Assure VoIP Calls
The network must be intelligent enough to prioritize traffic types and sufficiently resilient to prevent dropped calls. Prioritization must occur not only under normal operating conditions but also when the network is experiencing high utilization levels. Juniper Networks enterprise routers were designed to perform appropriately, under any network conditions, with the modular JUNOS operating system and its enhanced quality of service (QoS) capabilities. These routers enable construction of resilient IP/MPLS networks that can automate failover to redundant connections, without call interruption, in less than 50 milliseconds.
Where links are constrained, the bandwidth available to voice can be increased. Juniper Networks WAN acceleration platforms use a mix of bandwidth management, compression, and caching of repeated sequences to reduce overall data capacity needs. Additionally, the platforms reduce delay and can compress VoIP headers by combining many small VoIP packets into one, further optimizing bandwidth use.
Protect VoIP Systems
VoIP presents unique security challenges. Organizations must protect not only the VoIP media, but also the VoIP signaling, since both can be targets for attack. Inadequate security can lead to denial of service (DoS) attacks, unauthorized access to VoIP assets and other security breaches. In addition, security devices must be able to handle the small packet characteristics of VoIP traffic to ensure that call quality is maintained end to end. Juniper Networks Firewall/IPSec VPN and Intrusion Detection and Prevention devices provide a complete solution for defense against security threats to VoIP networks - no compromise to the unique processing demands of VoIP traffic.
Connect Remote Users
Encrypted tunnels allow remote users to connect directly to corporate voice systems using softphones on their computer. SSL is the recommended VPN option because it supports browser-based encryption without special client software or remote equipment. Juniper Networks SSL platforms are easy to deploy and support, enabling organizations to extend their VoIP network beyond the office to teleworkers and mobile users.
Customer Case Studies
- BOC Edwards
223 KB
Juniper Networks Prioritizes Time-Sensitive SAP and VoIP Traffic While Increasing Bandwidth and Realizing ROI. - De Bortoli Wines209 KB
Juniper Networks Improves WAN Performance to Ensure Consistent Performance of Mission-critical and Time-sensitive Applications - Hines & Associates331 KB
Juniper Networks Provides Fast VoIP and Citrix Relief for Healthcare Management Firm. - Hitachi Consulting48 KB
Hitachi Consulting Connects Employees via VoIP using Juniper's Network Security Solution.
Literature
Application Notes
- IP Telephony Solution with Juniper, Avaya and Extreme1.4 MB
Application Note describing a verified reference architecture for WAN IP telephony with these three vendors.
Solution Briefs
- Juniper Networks Solution for Microsoft Unified Communications369 KB
- Securing VoIP Deployments with IDP Business Implications109 KB
Enterprises are widely adopting VoIP solutions for use in their day-to-day business and it's becoming increasingly critical that the solution be protected to ensure continuing operation. This brief discusses developments in the VoIP market, the requirements for securing a VoIP deployment, and what the Juniper Networks IDP solution can do to thwart VoIP-related attacks. - Secure and Assured Voice Networking195 KB
Businesses are turning to IP telephony to reduce costs by consolidating multiple services onto a single network, enhance productivity with unified messaging and other new tools, and increase mobility by enabling workers to access the same voice features while telecommuting or traveling that they would use in the corporate office. - VOIP on the WAN: It's a Matter of Priorities228 KB
How Juniper Networks delivers prioritized bandwidth for VoIP deployments in WAN environments.
White Papers
- Enabling IP Telephony with Juniper Enterprise Solutions676 KB
The paper looks at real-world examples of the needs of IP telephony users in the enterprise, including headquarters-based campus worker, branch office user, teleworker and mobile worker. - Enterprise VoIP Security: Best Practices128 KB
This paper enumerates the risks inherent in enterprise VoIP networking; describes and quantifies them; and prescribes approaches for minimizing these risks in accordance with the highest standards now available to the industry. - High Availability for Business IP Telephony603 KB
Juniper Networks has solutions that enable an organization to deploy optimized voice networks that support IP telephony services. This white paper provides details on Juniper Networks high-availability capabilities. - Delivering Predictable IP Communications102 KB
The convergence of real-time applications, particularly IP communications, onto traditional IP networks creates new network requirements, one of which is the ability to provide acceptable levels of quality for delay sensitive, real-time applications - regardless of unexpected network events. - Voice Over IP 101: Understanding VoIP Networks488 KB
This paper explains the fundamentals of VoIP, focusing on the functions and components that make up a VoIP solution.