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Table 96
M3900 Series Meridian Digital Telephone accessory compatibility (Part 2 of 2)
HW Port
HEAD
EXT.ATR*
SET
HD SET
EXT.ATR
GPIO
RCDR
Environmental and safety considerations
Temperature and humidity
Line engineering
553-3011-100
Standard 14.00
M3900 telephone series
SIDL +
SDI
USAR
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
Operating state:
Temperature range
Relative humidity
Storage:
Temperature range
Relative humidity
Meridian Digital telephones use twisted pair wiring on transmission lines
selected by the rules given in Digital Telephone Line Engineering (553-2201-
180). The maximum permissible loop length is 3500 ft. (1067 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.).
Note: Use only the line cord provided with the telephone. Using a cord
designed for another telephone could result in damage to the cord.
January 2002
USAR
UART
T
T
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
OK
0° to 50°C (32° to 104°F)
5% to 95% (noncondensing). At temperatures
above 34°C (93°F) relative humidity is limited
to 53 mbar of water vapor pressure.
–50° to 70°C (–58° to 158°F)
5% to 95% (noncondensing). At temperatures
above 34°C (93°F) relative humidity is limited
to 53 mbar of water vapor pressure.
HEADSET
OK
N/A
X
OK
X
N/A
OK
OK
OK
OK
X
OK
GPIO
OK
X
OK
OK
N/A
OK
OK
N/A
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