Cisco Cisco Aironet 3500i Access Point 백서
Farpoint Group White Paper – April 2010
Spectral Assurance Total Cost of Ownership
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Mobility Services Engine (MSE) appliance. The second case is a pervasive deployment
of 3500-series APs, which includes all of the benefits of the partial deployment plus
automated remediation (also called “self-healing”) of interference-related problems.
As can be seen in Table 1, the WAM has a very low capital expense component, but a
very high operational expense because it is fundamentally labor-intensive. Based on
conversations with key staff at several large organizations now deploying spectral-
assurance solutions, as well as our own experience, we believe that a budgetary number
of 24 hours from incident to resolution is appropriate here. Note that additional personnel
latency and travel expense may be involved in any particular incident. Three-year TCO
(CapEx plus annual OpEx times three) is thus very high, and it should be again noted
here that continuous monitoring is not possible in this case.
The CIM – Partial case assumes an existing deployment and the addition of new 3500-
series APs in a 1:5 ratio (one 3500 to five existing APs). As was noted above, Farpoint
Group has found that this ratio will usually be between 1:4 and 1:6. Note, however, that
24/7 monitoring is now enabled, and personnel time required is vastly reduced.
The CIM - Pervasive example need consider only the differential cost of the 3500 AP,
$300, since no APs are already deployed in this case. Note, though, that the personnel
time required in this case is again significantly reduced due to the self-healing
capabilities enabled. Thus the three-year TCO of the Pervasive strategy is only
inconsequentially higher than that of the Partial case, making the choice and easy one for
greenfield deployments.
of 3500-series APs, which includes all of the benefits of the partial deployment plus
automated remediation (also called “self-healing”) of interference-related problems.
As can be seen in Table 1, the WAM has a very low capital expense component, but a
very high operational expense because it is fundamentally labor-intensive. Based on
conversations with key staff at several large organizations now deploying spectral-
assurance solutions, as well as our own experience, we believe that a budgetary number
of 24 hours from incident to resolution is appropriate here. Note that additional personnel
latency and travel expense may be involved in any particular incident. Three-year TCO
(CapEx plus annual OpEx times three) is thus very high, and it should be again noted
here that continuous monitoring is not possible in this case.
The CIM – Partial case assumes an existing deployment and the addition of new 3500-
series APs in a 1:5 ratio (one 3500 to five existing APs). As was noted above, Farpoint
Group has found that this ratio will usually be between 1:4 and 1:6. Note, however, that
24/7 monitoring is now enabled, and personnel time required is vastly reduced.
The CIM - Pervasive example need consider only the differential cost of the 3500 AP,
$300, since no APs are already deployed in this case. Note, though, that the personnel
time required in this case is again significantly reduced due to the self-healing
capabilities enabled. Thus the three-year TCO of the Pervasive strategy is only
inconsequentially higher than that of the Partial case, making the choice and easy one for
greenfield deployments.
Table 1 – Sample model of the total cost of ownership (TCO) for three different deployment
scenarios. Yellow fields are variables. Source: Farpoint Group.
scenarios. Yellow fields are variables. Source: Farpoint Group.