Power Consumption; Line Engineering - Avaya 3900 Series User Manual

Environmental, power, and safety considerations

Power consumption

Table 32: Avaya 3900 sets power consumption
for the Avaya 3900 Series Digital Deskphones.
Table 32: Avaya 3900 sets power consumption
Idle
H/F
Nominal
H/F
Maximum
DBA Idle
DBA H/F
Nominal
DBA H/F
Maximum
2 KBA Idle
Note:
Units of measurement are milli-amps (ma). The Avaya 3905 uses a switch mode power
supply and the Avaya 3904 uses a linear power supply. When a handset is off-hook with
maximum volume, the current increases 2 to 5 ma using linear power supply and 1.5 ma
on the Avaya 3905 using switch mode power supply.

Line engineering

Avaya 3900 Series Digital Deskphones use twisted pair wiring on transmission lines. The
maximum acceptable loop length is 1067 m. (3500 ft.), assuming 24 AWG (0.5 mm) standard
twisted wire with no bridge taps. A 15.5 vdB loss at 256 kHz defines the loop length limit. Longer
lengths are possible, depending on the wire's gauge and insulation.
Caution:
Use only the line cord provided with the telephone. A line cord designed for another
telephone can cause damage to the equipment.
136 Avaya 3900 Series Digital Deskphones User Guide
Avaya 3901 Avaya 3902 Avaya 3903 Avaya 3904
29.3 37.3
45.7
64.3
on page 136 shows the power consumption
42.5 31.5
48.7 37.5
59.7 46.4
39.29
45.9
52
33.42
Avaya 3905
15.02
15.31
14.98
August 2010