Cabletron Systems 9A000 manual C.2.6 34 Mbps E3 Module, C-13, Hardware Specifications

Hardware Specifications

C.2.6 34 Mbps E3 Module

The following specifications apply to network modules NM-2/E3C and NM-4/E3C:

Description	Specification
Port Capacity	Two or four E3 ports per module
Data Rate	34.368 Mbps
Output Buffer	13,312 cell capacity
Media	Coaxial
Max. Line Length	~450 ft
Connector	BNC
Line Encoding	HDB3
Framing	Per ITU-T G.832 or G.751
Clock Accuracy	±20 ppm
Timing	Primary and secondary 8kHz reference from
	internal (default) or network
Loopbacks	Transmit and receive loopbacks
Impedance	75 ohms nominal
Statistics/Alarms	Line code violations (LCV), framing bit errors
	(FER), P-bit and C-bit errors, header check
	sequence (HCS) errors, cells received (RxCells),
	cells transmitted (TxCells), signal/clock detec-
	tion, code violations, bit errors, parity errors,
	and AIS indication
Compliance	ATM Forum AF-PHY-94-0406 R5, ITU-T G.703,
	G.751, G.832, G.804

C-13