Zhone IMACS-200 ユーザーズマニュアル

ページ / 294
System Standards and Specifications
A-5
A.4.2
FXS port Specifications
FXS ports IMACS-200-FXS
Number of Ports
IMACS-200-FXS
4 ports
Physical Interface
Connector
1 female 50-pin telco connector
Transmission Performance
Performance
Exceeds requirements of ITU-T Rec. G.713
Signaling Modes
 Signaling Modes
Foreign Exchange Station (FXS) Loop Start and 
Private Line 
Automatic Ringdown (
PLAR)
Termination Impedance
IMACS-200-FXS
600 Ohms with 2.16 
µ
F
VF Transmission Characteristics
Nominal Transmit TLP
Defaults to +2.0 dB. Can be set from -6.5 dB to +9.0 dB
Nominal Receive TLP
Defaults to -2.0 dB. Can be set from -9.0 dB to +3.0 dB
PCM Encoding
Software selectable on a per port basis
Attenuation Versus Frequency Relative to 1 kHz with 0 dBm0 input
Frequency
Transmit (A to D)
Receive (D to A)
200 Hz
-0.25 to +3.0 dB
-0.25 to +2.0 dB
300 to 3000 Hz
-0.25 to +0.5 dB
-0.25 to +0.5 dB
3200 Hz
0.25 to +0.75 dB
-0.25 to +0.75 dB
3400 Hz
-0.25 to +1.5 dB
-0.25 to +1.5 dB
Return Loss (at 1 kHz)
>28 dB
Transhybrid Loss
34dB
Idle Channel Noise (rcv and xmt)
< -65 dBm0p Typ < -70 dBmop or < 20 dBrnc0
Interchannel Crosstalk
Typ < -75 dBm0 using 7 adjacent channels being disturbed with a signal 
of 0.0 dBm0
Total Distortion including Quantization (Signal to Distortion Ratio) Input Frequencies 1004-1020 Hz
Input Level
Rcv or Xmt
Overall
-30 to 0 dBm0
>35 dB
>33 dB
-40 dBm0
>29 dB
>27 dB
-45 dBm0
>25dB
>22 dB
Absolute group delay
< 750 microseconds
Group Delay Distortion vs. frequency
within boundaries of ITU-T Rec. G.713 Figure 2
Longitudinal Balance
Nom > 46 dB
Typ > 50 dB
Variation of Gain with Input Level
within boundaries of ITU-T Rec. G.713 Figure 7