CHALLENGE
In This Case Study
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Cisco® Unified Video Advantage brings video telephony to Cisco Unified
IP phones, enabling users to add video to their communications experience.
This video telephony solution is based on Cisco Unified CallManager and
is comprised of the Cisco Unified Video Advantage software application,
Cisco VT Camera, and a standard Cisco Unified IP phone. With a Cisco VT
Camera attached to a PC colocated with a Cisco Unified IP phone, a user
can place and receive video calls from the IP phone. Users can make calls
using the familiar phone interface, and calls are enhanced with video
without requiring any extra button-pushing.
- Whenever Cisco SystemsŪ considers introducing a new internal service
or technology, Cisco IT must understand the user impact and benefits
in order to justify the costs associated with the new capability.
From a technical perspective, Cisco IT must ensure that new technology
will not interfere with the delivery of mission-critical services,
and that it will integrate with the company's existing infrastructure.
The Cisco Unified Video Advantage pilot was initiated with the following
business goals:
- Demonstrate and promote Cisco video telephony innovation by helping
Cisco become its own best customer.
- Develop a scalable, supportable, easy-to-use architecture that can
be used by other Cisco customers and that validates Cisco's virtually
networked voice and video strategy.
- Integrate the Cisco Unified Video Advantage solution with voice
and video conferencing technologies currently available to Cisco employees.
- Provide the solution to all Cisco sites that have adequate infrastructure
resources and adequate end-user demand.
- To understand the impact Cisco Unified Video Advantage would have
on the infrastructure, a pilot was planned for early 2005. Four major
goals were identified to drive the gathering of metrics and fully
evaluate this new enterprise service:
- Cisco Unified CallManager— Evaluate Cisco
Unified Video Advantage's impact on the reliability and stability
of CallManager clusters. Measure the CPU load imposed, as well as
the increase in utilization of virtual memory.
- Network—Determine the additional bandwidth
required for the video service, and measure the incidence of insufficient
bandwidth during typical use. Validate quality of service (QoS) policies
and test functions to provide sufficient priority for audio and video
calls.
- Required support resources—Validate support
processes, and determine any additional support requirements. Monitor
common support requests, evaluate self-install feasibility, and test
the Web-based training for the future companywide rollout.
- User benefits—Survey pilot users to determine
the typical usage patterns, enhanced communications, productivity
improvements, and other tangible benefits from the deployment.
The Pilot
Approximately 750 Cisco employees were registered as pilot users. These
employees were located in 46 different Cisco locations across the globe.
Sites and users were chosen for a variety of reasons. Selected users
were part of cross-functional organizations or virtual teams that required
a significant amount of intersite meetings conducted by video or audio
conference. These included engineers, executives, technical support
employees, and sales managers. Each site had to be able to participate
in the full production deployment. These sites usually consisted of
campuses, with multiple buildings.
The Cisco network topology is complex, comprised of multiple hub-and-spoke
sites that are linked together in a partial mesh topology. Several Cisco
Unified CallManager clusters route voice calls across this network.
While effective, this configuration made it challenging to capture accurate
network and CallManager metrics required for the pilot. To overcome
these challenges, the Australia/New Zealand (ANZ) region was added to
the list of sites to participate in the pilot. This region, consisting
of multiple sites, is supported by a single CallManager cluster and
was able to provide accurate and accessible usage reporting information.
In addition, all of the ANZ sites are connected via a Multiprotocol
Label Switching (MPLS) VPN topology, where all sites are one network
hop away from each other. This provides an accurate environment for
measuring network bandwidth usage-all site traffic traverses a single
gateway (or router) interface (Figure 1). Finally, the ANZ sites have
much smaller WAN connections (2-10 MB) than the rest of the participating
locations. These smaller connections make it easier to study the potential
WAN bandwidth and impact of QoS on video telephony communications.
RESULTS
The success of the pilot was due in part to effective postpilot communications.
User feedback was gathered using Web-based surveys. Combined with other
measurements taken during the pilot, the overall feedback and lessons
learned were channeled back to Cisco product marketing, engineering,
and sales and marketing teams.
The data collected by the project team was focused on meeting the goals
defined prior to the initiation of the pilot:
"Cisco Unified
Video Advantage integrates easily into our existing infrastructure and
business processes. In addition to our quantitative analysis, the pilot
provided us with valuable qualitative feedback from our employees. The
more cameras we install, the more we expect to realize productivity
gains and cost savings from avoided travel. The new visual dimension
that Cisco Unified Video Advantage brings to a phone call is expected
to provide even more value to our employees when it becomes more broadly
available."
Rob Gates,
Project Manager, Cisco IT
- Cisco Unified CallManager impact—The CallManager
cluster supporting the ANZ sites was used to measure this impact.
CPU load and virtual memory utilization were examined, and video calls
placed or received were counted and captured in the CallManager call
detail records (CDRs). By comparing measurements before and during
the pilot, the project team determined that Cisco Unified Video Advantage
calls did not negatively impact the existing CallManager cluster.
- Network impact—A network analysis tool, NetQoS,
was used to measure the Cisco Unified Video Advantage deployment's
impact on the underlying network. Several CallManager counters were
tracked during this measurement, including video calls completed,
incidences of "video out of resources," and available video bandwidth.
These measurements determined that the network was not a limiting
factor for the 750-user pilot. In addition, the number of simultaneous
calls was higher than the number of calls rejected due to insufficient
bandwidth. Put another way, calls would complete with video more frequently
than without. The pilot survey indicated that the limiting factor
was likely due to the limited number of people with cameras participating
in the pilot.
- Support—The pilot evaluated the impact on
support resources and the effectiveness of user training modules.
It was determined that the current support resources, with the addition
of one Cisco Global Technical Response Center (GTRC) technical support
analyst, would be able to successfully handle the additional cases
generated by a production deployment of Cisco Unified Video Advantage.
The majority of support requests were categorized as installation
and setup issues, and centered around getting users' IP phones enabled
so they could participate in the pilot. Additional installation and
setup procedures were simplified for the production rollout, including
the creation of a quick-start guide and onsite tutorial events to
clarify installation procedures and minimize support requests.
- User benefits—To evaluate the potential productivity
benefits of adding video to audio calls, a postpilot survey was sent
to 750 pilot participants, and 136 (17 percent) participants responded
(Figures 2 and 3). The questions focused on ease of use, increase
in productivity, and rate of adoption. According to the survey results,
the Cisco Unified Video Advantage application was easy to install
and operate. The adoption survey questions and additional anecdotal
feedback indicate that, when the full production rollout is complete
and all employees have Cisco Unified Video Advantage, the usage rate
will dramatically increase and productivity gains will be easier to
quantify.
LESSONS LEARNED
The Cisco Unified Video Advantage pilot project was deemed a success,
with measurable goals and satisfied users. The lessons learned include:
- Phones should be "blanket-enabled" at a given site (not enabled
one by one) to reduce the support burden.
- Pilot users would like to be able to place multipoint calls.
- More than 80 percent of the support requests were resolved by level
1 and level 2 support staff.
- Productivity improvements were difficult to quantify due to the
limited number of video callers, but pilot users consistently expressed
the opinion that the solution would provide more productivity improvements
when it is more broadly deployed.
- Cisco Unified Video Advantage deployment has little impact on production
CallManager.
- The network was not the major bottleneck in smaller deployments
like ANZ, but technology adoption seems to be a bigger barrier based
on the restricted number of pilot participants.
"At Cisco, we try to be our own best customer," says Rob Gates, the
Cisco IT Project Manager for the Cisco Unified Video Advantage pilot.
"Our business environment changes rapidly and the challenges we face
are typical of any large enterprise. With a new technology like video
telephony, a deployment must carefully evaluate the potential gains
against any impact on current support resources and infrastructure."
NEXT STEPS
The planning and implementation of a broader rollout of Cisco Unified
Video Advantage to all Cisco employees located at Tier 1 sites began
immediately after the pilot project was completed. It is expected that
an additional 30,000 cameras will be deployed by the fourth quarter
of fiscal year 2006.