Nortel Networks Option 11C Manual Do Utilizador
Transmission parameters
Page 171 of 544
Method 1
With a noise signal corresponding to CCITT recommendation 0.131 applied
to the input interface, the total distortion measured at the output interface lies
above the limit given in Table 50.
to the input interface, the total distortion measured at the output interface lies
above the limit given in Table 50.
Method 2
With a sine wave at the reference frequency is applied to the input interface,
the total distortion measured at the output port interface lies above the limit
given in Table 51.
the total distortion measured at the output port interface lies above the limit
given in Table 51.
Reference frequency:
•
1020 Hz µ-Law
•
820 or 420 Hz A-Law
Table 50
Total distortion method 1
Total distortion method 1
Input Signal
dBmO
Analog — Analog
dB
Digital — Analog
dB
-55
11.1
13.1
-40
26.1
28.1
-34
30.7
32.7
-27 to -6
32.4
34.4
-3
24.0
26.8