Liebert IP Telephony Availability System - UPS, Distribution and Enclosure


Liebert IP Telephony Availability System - UPS, Distribution and Enclosure

Packaged power protection for IP telephony in remote access points

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The Liebert IP Telephony Availability System brings data center-level power protection to network edge equipment in remote access points, such as branch offices, retail stores and other locations. It supports stackable switches and routers with Liebert on-line UPS, power distribution, monitoring and a secured enclosure.

The Liebert IP Telephony Availability system, version 1.0 has met the Cisco Technology Developer Partner Program test criteria for interoperability with Cisco Unified CallManager 4.2(3), Cisco Unity 4.2(1), Cisco Unity Express 2.3 (1), Cisco CallManager Express 4.0 (3), and Cisco Unity Bridge 3.1 (1) Liebert IP Telephony Availability System ensures telephone system availability with a bundled solution:

  • True on-line protection with Liebert GXT double-conversion UPS.
  • Power system monitoring, communications and remote control via Liebert IntelliSlot Web Card.
  • System security via a Liebert Foundation Wallmount wall-mount or free standing enclosure with a locking door and hinged back.
  • Longer uptime with extended battery options.
  • Pre-packaged power/enclosure solution for IP Telephony systems
  • Meets Cisco test requirements to support many Cisco systems
  • Includes Liebert on-line UPS, power distribution, monitoring and enclosure


  • Houses IP Telephony equipment and Liebert protection products in a compact, secure enclosure.
  • Extends uptime with optional external batteries.
  • Offers a choice of cabinet styles and sizes to meet site needs.

Higher Availability

  • Ensures highest power availability with on-line UPS technology.
  • Allows equipment operation even during UPS maintenance with maintenance bypass unit.
  • Enables remote monitoring and centralized control of the connected equipment through the installed communications card.

Lowest Total Cost Of Ownership

  • Eliminates the possibility of incompatible equipment by employing a proven, bundled solution.
  • Installs and relocates quickly.

Ideally Suited For

  • IP Telephony equipment
  • Other edge-of-network equipment in remote locations
Product FAQs

Is an IP Telephony system different from other network applications?

While the IP telephony system may operate over an existing IT network, it requires a higher degree of reliability. Most end users see the telephone as a “bulletproof” system, expecting it to work even when nothing else does. To match the reliability of standard phone systems, an IP telephony system must have extended battery back-up or generator support, true-online, double-conversion UPS on every router, server, switch and other important component, and the capability to power individual phone sets through the communications wires (a capability that standard phone systems possess today). The need for connecting to 911 services even when there is a power outage makes online protection even more critical.

Is power conditioning as important as battery back-up?

In a word, Yes. This is even more important with the newer, gigabit-scale routers and switches. While the average network must deal with about 15 significant power outages a year – 90 percent of which last less than five minutes – most networks face an average of one power disturbance per day. Some network managers have already found out the hard way that anything but true online, double-conversion UPSs can let power problems through to switches and routers. Line-interactive UPS equipment loses contact with ports, drops packets, and even shuts down unexpectedly when power disturbances pass through the UPS. It can cause problems merely by switching to and from battery to “protect” vital systems. If applications are mission critical, the only safe route to high availability is an online, double-conversion UPS.

Is the IP Telephony system being added to an existing network?

If so, make sure your protection is up to the “Five Nines” standard defined by Cisco and other equipment providers. Many rack-based networks are operating at a lesser standard because they have line-interactive protection, and many others may lack the back-up power capacity to provide a phone system protection that meets user expectations. Adding more load or longer ride-through times may require a shift from rack-mounted protection to room-level protection. Now is the time to re-think your protection scheme, and build high availability into all mission-critical applications.

What does the industry say about maintaining high availability for IP Telephony systems?

The Cisco white paper, IP Telephony: The Five Nines Story, states that high-availability protection – defined as “five-nines” (about 5 minutes of downtime per year) – must include “UPS and generator backup for all distribution, core, gateway and Cisco CallManager devices.”

The paper goes on to list Cisco’s high-availability requirement:

  • UPS and generator backup
  • UPS systems have auto-restart capability
  • UPS system monitoring
  • Four-hour response service contract for UPS system problems
  • Maintain recommended equipment operating temperature 24x7

This has been Liebert’s basic standard for high availability for decades, and reflects Liebert’s long-standing product and service mix.

Where is the IP Telephony equipment being installed?

Even when other network applications are centralized in a protected datacenter, an IP telephony system is likely to have at least some decentralized pieces of vital hardware. Adding a router or switch to a server stack implies one kind of protection need. Installing an IP telephony application in a campus environment requires high-availability protection for every node in the network, including, in many cases, desktop phone sets and wireless LANs. Power protection becomes something far more complex and challenging than the approach used for traditional IT applications.







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