Chapter 1 Introduction
12
1.1.9 E&M Line Card
Each card includes 6 E&M ports (Ear and Mouth), offering either 2-wire or 4-wire voice transmission and E&M signaling with
TYPE1 to TYPE5.
1.1.10 X.50 Line Card
Each card contains five low-speed Asynchronous/synchronous data interfaces
Data rates:
19.2kbps, 9.6kbps, 4.8kbps or 2.4kbps
Standards compliance:
RS232/V.24
1.1.11 ET100 Ethernet Bridge Line Card
Ethernet Bridge Tributary card provides Ethernet over E1 capability. Incorporating two 10/100Base-TX channels. this
transparent bride supports standard HDLC encapsulation. The WAN data rate depends on the number of E1 timeslots assigned
(Nx64).
1.1.12 RS-485/RS-422 Line Card
Asynchronous RS-485/RS-422 Serial Tributary card provides six independent RS-485/RS-232 data channel capability.
Incorporating six separate channels. channels can be independently assigned any Nx64 timeslot from the aggregate E1. Each
channel uses a pluggable 4-pin terminal block for connecting one or two twisted pair wires.
1.1.13 SUB-E1 Line Card (Under)
Each card contains two G.703 E1 interfaces. Each SUB-E1 may be multiplexed into any of the E1A1, E1A2, E1B1, or E1B2
interfaces. For special applications requiring the need for Timeslot #0 to be able to transmit the data of CAS signaling, the
SUB-E1 supports Timeslot #0 bypass.
1.1.14 Additional Features
Optional expansion chassis for dense data ports application.
All modules are hot-swappable.
Note: The 9th ~ 18th slots are defined as I/O slots, and described logically as slot 01 ~ slot 10. The upper & back panel of I/O
slots have been clearly marked on the rack. Any of the logical slots 1 ~ 10 can random insert N64K/V35,A/SYNC-128K,
G703-64K, E&M, FXS, FXO, MAGNETO, Sub E1 or Ethernet Bridge I/O line cards.
1.2 Technical Specifications
1.2.1 E1 Line Card
E1 signal structure
Frame format:
CAS(PCM30)/CCS(PCM31), CRC4 ON/OFF
Bit rate:
2.048Mbps
Line codes:
HDB3/AMI
Rx sensitivity:
0 ~ -43dB
Transmission:
1.5km over 0.5mm E1 cable
Line impedance:
75 ohms (unbalanced) / 120ohms (balanced)
Pulse amplitude:
nominal 2.37V (75ohm) / nominal 3.00V (120ohm)
Pulse shape:
ITU-T G.703
Jitter tolerance:
ITU-T G.823 compliant, jitter attenuator included
ITU-T compliance:
G.703, G.704, G.732, G.823.
Internal timing:
2./- 50ppm.
Interface connectors:
BNC (75ohm unbalanced) / RJ-45 (120ohm balanced).
System clock
Internal: 2.048Mbps
+/-50ppm;
Recovery: 2.048Mbps
+/-50ppm;
G.703 External:
2.0/-100ppm
Содержание ERM-MUX
Страница 1: ...ERM MUX Plus E1 Multi Service Access Multiplexer ...
Страница 2: ......
Страница 8: ...Table of Contents ...
Страница 20: ...Chapter 2 Installation 20 This page was left blank intentionally ...
Страница 30: ...Chapter 3 LED Indicators and Cable Pin Definitions 30 This page was left blank intentionally ...
Страница 58: ...Chapter 8 Application Notes 58 This page was left blank intentionally ...
Страница 59: ......
Страница 60: ......