Line engineering, M3900 set power consumption, Line eng ineering – Meridian Audio M3900 User Manual
Page 109
Environmental and safety considerations
Page 109 of 174
M3900 Series Meridian Digital Telephones Description, Installation and Administration
Line engineering
The M3900 Series Meridian Digital Telephones use twisted pair wiring on
transmission lines determined by the rules in Digital Telephone Line
Engineering (553-2201-180). The maximum acceptable loop length is 1067
m. (3500 ft), assuming24 AWG (0.5 mm) standard twisted wire with no
bridge taps. A 15.5 dB loss at 256 kHz defines the loop length limit. Longer
lengths are possible, depending on the wire’s gauge and insulation.
M3900 set power consumption
CAUTION
Use only the line cord provided with the telephone. A line cord
designed for another telephone can cause damage to the equipment.
Table 14
M3900 set power consumption
M3901
M3902
M3903
M3904
M3905
Idle
29.3
37.3
42.5
31.5
15.02
H/F Nominal
N/A
45.7
48.7
37.5
N/A
H/F
Maximum
N/A
64.3
59.7
46.4
N/A
DBA Idle
N/A
N/A
N/A
39.29
15.31
DBA H/F
Nominal
N/A
N/A
N/A
45.9
N/A
DBA H/F
N/A
N/A
N/A
52
N/A
Maximum 2
KBA Idle
N/A
N/A
N/A
33.42
14.98
Note: All measurements are in milli-amps.