Cabletron Systems 9A000 manual C.2.7 45 Mbps DS3 Module, C-14, Hardware Specifications

Hardware Specifications

C.2.7 45 Mbps DS3 Module

The following specifications apply to network modules NM-2/DS3C and NM-4/DS3C:

Description	Specification
Port Capacity	Two or four DS3 ports per module
Data Rate	44.736 Mbps
Output Buffer	13,312 cell capacity
Media	Coaxial
Max. Line Length	~450 ft
Connector	BNC
Line Encoding	B3ZS
Framing	C-bit parity or clear channel
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, and AIS indication
Compliance	ATM Forum DS3 UNI v3.1, ANSI/Bellcore
	T1.102, T1.107, TR-TSY-000009

C-14