Meridian M3900 series, Installation And Administration

Page: 83 / 88

Environmental and safety considerations Page 83 of 86
M3900 Series Telephones Description, Installation and Administration
Refer to your distributor for the latest product bulletin from Nortel Networks
recommending headset types for use with the M3900 Series Digital
Telephone.
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), assuming 24 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.
CAUTION
Use only the line cord provided with the telephone. A line cord
designed for another telephone can cause damage to the equipment.