Zhone IMACS-200 ユーザーズマニュアル
A-6
System Standards and Specifications
Model No.
Running Head
A.4.3
E&M port Specifications
E&M ports 4-Wire
Physical Interface 4-Wire
Number of Ports
4
Connectors
4 RJ45 telco connector
Transmission Performance
Performance
Exceeds requirements of ITU-T G.712 (4-wire))
Signaling
Signaling Types
Switch selectable - all four ports are the same
Normal (toward user) and Trunk/Tandem (toward CO)
Normal (toward user) and Trunk/Tandem (toward CO)
Signal Modes
Software selectable per port
Transmit Only (to), Type I, II, IV and V.
Transmit Only (to), Type I, II, IV and V.
VF Transmission Characteristics
Nominal Transmit TLP
Software selectable
-16.5 dB to +7.5 dB in steps of 0.1 dB
-16.5 dB to +7.5 dB in steps of 0.1 dB
Nominal Receive TLP
Software selectable
-16.3 dB to +7.5 dB in steps of 0.1 dB
-16.3 dB to +7.5 dB in steps of 0.1 dB
Termination Impedance
with 2.16
µ
f capacitor in series 600 Ohms
PCM Encoding
Software selectable
µ
-law
A-law
Attenuation Versus Frequency as per AT&T TR43801 - 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
Against 600 Ohms, in series with 2.6
µ
f with additional 25 Ohms
resistor between the channel unit and the return loss measurement set.
4-wire
1kHz 28dB min.
300 to 3000 Hz 23dB min.
300 to 3000 Hz 23dB min.
4W Return Loss (at 1 kHz)
>20dB Typ > 27dB
Relative Transhybrid Loss
Against 600 Ohms, in series with 2.16
µ
f termination.
Idle Channel Noise (rcv and xmt)
< -65Bm0p. Typically < -70 dBm0p or < 20 dBrnc0 <20dBBrnc0
Interchannel Crosstalk
Typ < -75 dBm0 using 7 adjacent channels being distributed with a
signal of 0.0 dBm0.
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
>33.9 dB
-40 dBm0
>20 dB
>27.6 dB
-45 dBm0
>25dB
>23 dB
Absolute group delay
< 600 microseconds
Group Delay Distortion vs. frequency
within boundaries of ITU-T Rec. G.712 Figure 2
Longitudinal Balance
>46 dB Typ > 50 dB
Variation of Gain with Input Level
within boundaries of ITU-T Rec. G.713 Figure 7 (2 wire)
within boundaries of ITU-T Rec. G.712 Figure 7 (4 wire)
Typical gain variation is within + 0.25 dB from +3 to -50 dBm0
within boundaries of ITU-T Rec. G.712 Figure 7 (4 wire)
Typical gain variation is within + 0.25 dB from +3 to -50 dBm0
Diagnostic Capabilities