Avaya Application Solutions Deployment Manual page 233

Table 45 compares average failure rates of various Avaya components with industry averages
for similar components, demonstrating Avaya's commitment to reliability.
Table 45: Comparison of circuit packs and subassemblies failure rates
Industry data
Component
2
Logic boards
2
Disks
ISP server class power
4
supply
Power (North America)
2
LAN
1. All numbers assume 24 hours per day, 7 days per week usage.
2. Taken from Microsoft High Available Operations Guide.
3. Based on numerous internal Avaya studies of millions of user-hours.
4. Based on an internal survey of reputable vendors.
The data in Table 45 shows that in several cases Avaya's subassemblies are so reliable that it
would take twice the number of industry-typical subassemblies to reach the same availability
level.
Avaya system elements
Mean time Component
to failure
3-20 years Media processor circuit
pack
1-50 years Protocol preprocessor
circuit pack (C-LAN)
20-25 years Digital line/trunk circuit
packs
2
5.2 months S8700 Server complex:
"duplex"/"high & critical"
3 weeks Power supplies
IP Server Interface (IPSI)
circuit pack
Expansion Interface (EI)
circuit pack
(Industry) Power (North
America)
(Industry) LAN
3
Issue 3.4.1 June 2005
Reliability
1
Mean
time
to failure
50 years
50 years
72-77
years
9 / 90+
years
45 to 60
years
50 years
20 years
5.2
months
3 weeks
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