Introduction 

 
Spacecom 2×E1/10/100baseT series are user-end accessing equipments developed and produced with Spacecom’s 
self-developed special-purpose integrated circuits. They are used for Ethernet data that takes super-large special-purpose 
integrated circuits as the core to realize user data accessing via E1 transmission network, so that Ethernet data can be 
transmitted over multiple E1s, breaking the bandwidth restriction of single E1. They can easily leverage the rich existing E1
resources in the public network to build broadband Ethernet data network rapidly.
 
Spacecom N×E1/10/100baseT series has no special requirements for E1 channel, and can automatically tolerate errors from E1 . 
Even if some E1 channels fail, only the equipment’s data throughput can be reduced, no interruption of the transmission of data. 
They can be flexibly configured and easily maintained, and at the 
same time can provide complete network management capabilities. 

Features: 

• Adopt large-scale chips ,simple circuit, low power consumptionand high reliability
• Provide 1~2 10/100M base-T ports, support 10/100M full duplexand half duplex and support auto-negotiation mechanism;
• Provide a same kind of E1 configure, E1 interface impedancesupport 75Ωand 120Ω
• E1 route way support inter BERT (Bit Error Rate Test)function;
• E1 loop return test available;
• Support 802.1p PRI function;
• Support flux control function which based on 802.3x;
• Support transparent transmission of VLAN Ethernet frames;
• Support a management interface, and setup function of equipmentneatly;
• Has complete warning and status indication;
• Support multi-power supply environment.

Tech Specifications

• Electric Indexes of E1 Interface:
• Nominal rate: 2048Kbps, tolerance: ±50ppm
• Interface code type: HDB3
• Interface impedance: 75Ω (imbalance) or 120Ω (balance)
• Electric features of the digital interface: compliant withITU-TG.703 recommendation
• Features of jitter transfer: compliant with ITU-TG.823recommendation
• Input jitter tolerance: compliant with ITU-TG.823recommendation
• Input jitter: compliant with ITU-TG.823
• Electric level: ±2.37V±10% or ±3.00V±10%
• Interface connector: BNC, CC4 (75Ω) or RJ45 (120Ω)

10/100base-Tx Interface Indexes:

• Interface: 10/100base-Tx
• Interface rules: compliant with IEEE-802.3u standard
• Interface rate: 10/100M self-adaptable
• Interface connector: RJ-45

Management Interface

• Interface mode: RS-232
• Interface level: RS-232 level
• Interface connector: RJ-45
• Baud rate of management interface: 57600bit/s

Power Supply

• DC voltage: -48VDC, Tolerance range: -36V~-72V,
• Power supply ripple: ≤240mVp-p
• AC voltage: 220VAC±20% 50HZ, Tolerance range: 90V~264V,
• Power consumption: ≤10W

Working Environment

Ambient temperature: 0°C~45°C     

Relative humidity: ≤90% (at 35°C) 

Atmosphere pressure: 86-106Kpa