Installation guide

248 Planning and Installation Guide ShoreTel 14.2
Site Requirements and Preparation Reliability and Availability
12
Since the ShoreTel system is plug-and-play, a switch can be replaced in minutes.
Distributed call control software means there is no system-wide single point of failure. If a single
ShoreTel voice switch fails, all the other voice switches continue to operate.
Table 51 shows the reliability information for the ShoreTel IP phones. Hourly numbers shown are
based on demonstrated reliability (as opposed to calculated).
ShoreTel 90BRI 172,659 n/a 1 99.9994%
ShoreTel 90BRIV 162,931 n/a 1 99.9994%
ShoreTel 120/24 84,500 518,134 1 99.9997%
ShoreTel T1 158,229 312,709 1 99.9997%
ShoreTel T1K 189,373 n/a 1 99.9994%
ShoreTel E1 154,229 312,709 1 99.9997%
ShoreTel E1K 189,373 n/a 1 99.9994%
ShoreTel 220T1 189,373 n/a 1 99.9994%
ShoreTel 220T1A 163,516 n/a 1 99.9994%
ShoreTel 220E1 189,373 n/a 1 99.9994%
MTBF – Mean time before failure
MTTR – Mean time to repair
Availability – %uptime/time – MTBF/(MTBF+MTTR)
Table 51: ShoreTel IP Phone Dependability
Phone MTBF hours (calculated) MTBF hours (demonstrated)
IP110 64,800 490,000
IP115 N/A TBD
IP212k 58,200 350,000
IP230 58,200 350,000
IP265 N/A TBD
IP420 N/A N/A
IP480 N/A N/A
IP480g N/A N/A
IP485g N/A N/A
IP560 56,300 360,000
Table 50: ShoreTel Voice Switch Dependability (Continued)
Voice Switch
Predicted
MTBF
(hours)
Demonstrated
MTBF (hours)
MTTR
(hours)
Availability