CTC Union ETU01-Plus, Руководство пользователя

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Chapter 1. Introduction
7
Chapter 1 Introduction
1.0 Welcome
Thank you for selecting the ETU01-Plus for your E1 service termination. We hope
you find this device in perfect working order and that it provides many years of
reliable service.
1.1 Product Description
The ETU01-Plus is a single V.35 serial port access unit for E1 or Fractional E1
service. The ETU01U-Plus is a single V.35 serial port access unit for Unframed E1
only. The ETU01-Plus AC model has a universal, auto-switching power supply
(90~250VAC) while the DC model's internal regulator module accepts DC voltages
from 18 to 75 volts.
1.2 Technical Specifications
E1 link
Framing -Unframed (ETU01U-Plus only Unframed)
-CCS (PCM31)/CAS (PCM30)
-CRC4 ON/OFF
Bit Rate 2.048 Mbps
Line Code -AMI
-HDB3
Line Impedance -75 ohms
-120 ohms
Relative Receive Level 0 to -43dB
"Pulse" Amplitude
-Nominal 2.37V
±
10% for 75 ohms
-Nominal 3.00V
±
10% for 120 ohms
"Zero" Amplitude
±
0.1V
Transmit Frequency Tracking
Internal Timing
Loopback Timing
External Timing
±
30 ppm
±
50 ppm
±
100 ppm
Jitter Performance According to ITU-T G.823
Complies With ITU-T G.703, G.704, G.706 and G.732
Interface Connectors -BNC (unbalanced)
-RJ-45 (balanced) per USOC RJ-48C