Zhone Technologies IMACS-200 - Manual (Page 258)

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)
Signal Modes Software selectable per port
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
Nominal Receive TLP Software selectable
-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.
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.
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
Diagnostic Capabilities