Installation guide

Environmental Requirements Site Requirements and Preparation
12
ShoreTel 14.2 Planning and Installation Guide 247
Environmental Requirements
The ShoreTel voice switches require that the environmental specifications provided in Table 49 be met.
Reliability and Availability
Each ShoreTel voice switch is an embedded product with a highly reliable fan. In addition, the power
supply contained within the voice switch has a very high individual mean time before failure (MTBF),
as shown in Table 50.
Table 48: ShoreTel Voice Switch Power and Heat Dissipation (Half-Width Switches)
Parameter
SG 90
SG 90BRI
SG 50
SG 30
SG 220T1
SG 220T1A
ShoreTel 220E1
Power dissipation
(typical)
40 W typ 40 W typ 17 W typ
Heat dissipation 137 BTU/hour 137 BTU/hour 58 BTU/hour
Table 49: ShoreTel Environmental Specifications
Parameter Specification
Operating temperature 0° to 50° C (32° to 122° F)
Operating humidity (non-condensing) 10% to 90%
Storage temperature –30° C to 70° C (-34.4° to 158° F)
Table 50: ShoreTel Voice Switch Dependability
Voice Switch
Predicted
MTBF
(hours)
Demonstrated
MTBF (hours)
MTTR
(hours)
Availability
ShoreTel 24A
ShoreTel 30 190,606 n/a 1 99.9994%
ShoreTel 30BRI 172,659 n/a 1 99.9994%
ShoreTel 40/8 132,300 515,581 1 99.9997%
ShoreTel 50 190,606 n/a 1 99.9994%
ShoreTel 50V 175,803 n/a 1 99.9994%
ShoreTel 60/12 91,000 519,359 1 99.9993%
ShoreTel 90 171,493 n/a 1 99.9994%
ShoreTel 90V 159,416 n/a 1 99.9994%