Chapter 1: specifications – Black Box MD403A User Manual
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Carrier Frequencies ITU-T V.34:
1600, 1646, 1680, 1800, 1829, 1867, 1920, 1959,
2000 Hz
Carrier Frequencies ITU-T V.32bis/V.32:
1800 Hz
Carrier Frequencies V.22bis/V.22 or Bell 212A Standard (2400 and 1200 bps):
Transmit originate: 1200 Hz; Transmit answer: 2400 Hz; Receive originate:
2400 Hz; Receive answer: 1200 Hz
Carrier Frequencies ITU-T V.23 (1200 bps):
Transmit originate: 390 Hz mark,
450 Hz space; Receive originate: 1300 Hz mark, 2100 Hz space; Transmit answer:
1300 Hz mark, 2100 Hz space; Receive answer: 390 Hz mark, 450 Hz space
Carrier Frequencies ITU-T V.21 (0 to 300 bps):
Transmit originate: 980 Hz mark,
1180 Hz space; Receive originate: 1650 Hz mark, 1850 Hz space; Transmit answer:
1650 Hz mark, 1850 Hz space; Receive answer: 980 Hz mark, 1180 Hz space
Carrier Frequencies Bell 103/113 (0 to 300 bps):
Transmit originate: 1270 Hz
mark, 1070 Hz space; Receive originate: 2225 Hz mark, 2025 Hz space; Transmit
answer: 2225 Hz mark, 2025 Hz space; Receive answer: 1270 Hz mark, 1070 Hz
space
Fax Carrier Frequencies:
V.21 Ch2 (half-duplex): 1650 Hz mark, 1850 Hz space
for transmit originate; 1650 Hz mark, 1860 Hz space for transmit answer; V.27ter:
1800 Hz originate/answer; V.29 QAM: 1800 Hz originate/answer; V.17 TCM:
1800 Hz originate/answer
Transmit Level:
-11 dBm (dial-up)
Frequency Stability:
±0.01%
Receiver Sensitivity:
-43 dBm under worst-case conditions
AGC Dynamic Range:
43 dB
Connectors:
(1) USB connector; (1) RJ-11 phone jack
Cables:
(1) RJ-11 phone cable
NOTE
Any cables connected to the computer should be shielded to reduce
interference.
Diagnostics:
Power-on self-test, local analog loop, local digital loop, remote digital
loop
CHAPTER 1: Specifications