Line Engineering - Meridian Nortel 1 Option 11C Technical Reference Manual

Page 298 of 544

Line engineering

553-3011-100 Standard 14.00
Meridian Modular Telephones
Storage:
Temperature range
Relative humidity
Electromagnetic interference
The radiated and conducted electromagnetic interference meets the
requirements of Subpart J of Part 15 of the FCC rules for class A computing
devices.
The maximum permissible loop length is 3500 ft. (915 m), 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).
The Meridian Modular Telephones use a 6 conductor line cord (A0346862).
Note: Use only the line cord provided with the Meridian Modular
Telephone. Using a cord designed for other digital telephones could
result in damage to the cord.
Figure 37 shows a simplified block diagram of the Meridian Modular
Telephone, MPDA and DLC in the Option 11C system.
January 2002
-50° to 70° C (-58° to 158° F)
5% to 95% (non-condensing). At
temperatures above 34°C (93°F) relative
humidity is limited to 53 mbar of water vapor
pressure.