TMB3EGS4 Is Huawei OSN 1800 4 Port EOS Board
            Huawei OSN 1800 4 Port EOS Board TMB3EGS4 Overview
TMB3EGS4: 4 x GE switching and processing board
The TMB3EGS4 is used to transmit/receive Ethernet services, manage bandwidths, and realize Layer 2 switching of Ethernet services.
The TMB3EGS4 consists of an Ethernet access unit, an encapsulation/mapping unit, a logic control unit, a power supply unit, and a clock unit.
Functions and features of the TMB3EGS4 board
| 
			 Function and Feature  | 
			
			 Description  | 
		
| 
			 Basic function  | 
			
			 Transmits/Receives 4 x FE/GE services, encapsulates and maps the Ethernet services into SDH signals, and forwards the SDH signals to the SDH plane for transmission.  | 
		
| 
			 Bound bandwidth  | 
			
			 16 x VC-4, or 48 x VC-3, or 252 x VC-12  | 
		
| 
			 Maximum uplink bandwidth  | 
			
			 2.5 Gbit/s  | 
		
| 
			 Number of services  | 
			
			 2000 unidirectional services  | 
		
| 
			 Service mapping mode  | 
			
			 Supports HDLC, LAPS, and GFP-F  | 
		


