Cabletron Systems SFCS-200BX - Manual (Page 140)

C-14
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