BT Inspiration Installation & Maintenance Manual page 58

Environmental Requirements
Doorstrike Relay Contact
Safety and Protection
system software EPROM
Music on Hold or Courtesy service
EPROM
Ringback Tone 400ms on 200ms off 400ms on 2sec off
Busy Tone 400ms on 400ms off
Congestion Tone 100ms on 100ms off
Hold Tone 200ms on 200ms off 200ms on 3.4 sec
off
Conference tone One burst of 400ms.
NU tone Continuous tone
Call waiting tone 100ms on 4.9 s off
Normal working temperature
Working humidity (non condensing) 10% to 80%
Storage temperature
Storage humidity
Max Rating 24 Volts DC
2 Amps
EN60950
EN41003 and EN300-047
Flash 4 Mb; access-time < 120 ns
1 or 2 Mb:
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0° C to 45° C
-20° C to +70° C
10% to 90%