Appendix C Voice Module Specifications 145
Reference for Passport 4460 Hardware
E&M Interface Analog Specifications
Line Impedance (E&M):
2-wire or 4-wire: 600 ohms +/- 10% (default) Complex:
2-wire Europe or Australian; selectable
Input Gain/Output
Attenuation:
Adjustable by +15 dB and/or -15 dB (DSP settings) in 1
dB increments
(Note that the end-to-end (port-to-port) insertion loss
should not exceed 0 dB (no gain) when setting up input
gain and output attenuation adjustments. There are no
restrictions on end-to-end loss adjustments)
Maximum Input/Output
Levels:
0dBm
4-Wire Output, Settable:
+7 dBm
Longitudinal Balance
204 to 1004 Hz:
1004 to 3404 Hz:
>58 dB
>48 dB
Note that the following specifications are only for G.711 PCM, with Port-x and Port-y
connected (2-wire tip and ring to 2-wire tip and ring or 4-wire tip1 and ring1 input to 4-wire
output tip and ring) and with default software settings:
Return Loses
Echo:
Singing:
200 to 3400 Hz:
>22 dB
>18 dB
single frequency Sine wave > 16 dB
Insertion loss (E&M):
<0.5 dB at 1004 Hz
Frequency Response:
(over range of 304 Hz to 3404
Hz)
+0.3 dB to -1.5 dB with respect to 1004 Hz
Idle Channel Noise
Inband
3 KHz filter
message:
PSofometric:
Out of Band
10 KHz-10 MHz
Transverse or
Metallic Noise:
<22 dBrn
<-65 dBmpo
<-70 dBm
Non Linear Distortion
(Multitone Signal)
Second and Third Harmonics:
<40 dB below signal level
Signal-to-Noise Ratio at
1004 Hz:
>35 dB
Summary of Contents for Passport 4460
Page 10: ...10 205677 F Rev 00...
Page 16: ...16 Contents 205677 F Rev 00...
Page 40: ...40 Chapter 1 The Passport 4460 Unit 205677 F Rev 00...
Page 80: ...80 Chapter 3 Expansion Modules 205677 F Rev 00...
Page 94: ...94 Chapter 6 Cables 205677 F Rev 00...
Page 128: ...128 Appendix A Indicators 205677 F Rev 00...
Page 148: ...148 Appendix C Voice Module Specifications 205677 F Rev 00...
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