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Appendix C Voice Module Specifications 147
Reference for Passport 4460 Hardware
Programmed
Complex impedance
Frequency response (300 Hz
to 3400 Hz) *
•
PCM
+0.2 to -0.5 dB
•
G729
+0.5 to -2.0 dB
Linearity *
•
(0 to -55 dBm) PCM
</= 1 dB
•
(0 to -40 dBm)
</= 1 dB
Longitudinal Balance
•
1 KHz
>/= 58 dB
•
1 to 3.4 KHz
>/= 48 dB
Idle channel noise (inbound) *
•
“C” message /
Psofometric
<16 dBrnc/65 dBmpo
•
3 KHz filter
</= 20 dBrn
Out of band noise (10 KHz to
10 MHz) *
</= -70 dBm
Channel cross-talk *
</= 70 dB
Maximum transmit and
receive levels
0 dBm
Transmit gain control (A to D)
•
-6 dB to 12 dB (total
18 dB)
•
12 dB control in 0.1
dB steps, 6 dB fixed
change
Receive ATT. control (D to A)
•
+6 dB to -12 dB (total
18 dB)
•
12 dB control in 0.1
dB steps, 6 dB fixed
change
Insertion loss at 1 KHz *
0 to 2 dBm (adjust)
Nonlinear distortion
(Multitone Signal)
2nd and 3rd harmonics *
>40 dB below signal
Signal to noise ratio
(1000 Hz) *
>/= 37dB
Loop Length
< 3000 feet
* End-to-end port 1 to port 2
requirements
Содержание Passport 4460
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Страница 16: ...16 Contents 205677 F Rev 00...
Страница 40: ...40 Chapter 1 The Passport 4460 Unit 205677 F Rev 00...
Страница 80: ...80 Chapter 3 Expansion Modules 205677 F Rev 00...
Страница 94: ...94 Chapter 6 Cables 205677 F Rev 00...
Страница 128: ...128 Appendix A Indicators 205677 F Rev 00...
Страница 148: ...148 Appendix C Voice Module Specifications 205677 F Rev 00...
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