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Table 53: S8700 system software availability
System
S8700 Server
Complex
Multi-Connect
S8700 Software
(due to longer
recovery times for
non-IPSI PNs)
IP-Connect S8700
Software
1. Based on 2,737 system-days of software reliability data collected from 14 different
(early-introduction and in-house) systems.
2. Based on 1,337 system-days of software reliability data collected from 6 different
(early-introduction and in-house) systems.
IP endpoint and remote media gateway recovery
Avaya's distributed IP-based systems can also enjoy increased availability by virtue of the
"alternate gatekeeper." When IP Telephones register with Communication Manager, they are
given a list of "alternate gatekeepers" to which they can re-register in the event of a failure.
Thus, if a C-LAN fails or becomes unavailable, users that are registered to that C-LAN can
re-home to another C-LAN that is unaffected by the failure.
This section covers:
IP endpoint recovery
Recovery algorithm
G700/G350 Media Gateway recovery
SW loads Avaya CM 1.1
through Avaya CM 1.36
90% Confidence:
4.52 - 5.54 nines
95% Confidence:
4.47 - 5.79 nines
90% Confidence:
4.45 - 5.47 nines
95% Confidence:
4.40 - 5.72 nines
90% Confidence:
4.58 - 5.61 nines
95% Confidence:
4.52 - 5.86 nines
Maintenance architecture
SW loads beyond Avaya
1
CM 1.2 and Avaya CM
2
1.37
90% Confidence:
5.36 - 6.24 nines
95% Confidence:
5.28 - 6.44 nines
90% Confidence:
5.28 - 6.17 nines
95% Confidence:
5.20 - 6.37 nines
90% Confidence:
5.41 - 6.31 nines
95% Confidence:
5.33 - 6.51 nines
Issue 3.4.1 June 2005
249
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