CANOGA PERKINS 2370 High-Speed Universal Fiber Optic Modem - Manual (Page 20)

EdgeAccess Universal Chassis System
Model 2370 Model User Manual 3-6
DC-37 Pin EIA-449 Signal Function Direction
18 TM Test Mode Out
19 SG Signal Ground
20 RC Receive Common
33 SQ Signal Quality Control
34 NS New Signal Control
37 SC Send Common
3.4 L132: EIA-422, TwinAx
The L132 ELIM is electrically compatible with the EIA-422A specifications. It uses five TwinAx
connectors. Table 4 lists the supported signals.
Table 4. EIA-422 Interface TwinAx Signals
Signal Name Direction
RXD Receive Data Out
TXD Transmit Data In
SCR Receive Clock Out
SCT Transmit Clock Out
SCTE External Transmit Clock In
3.5 L133: TTL, BNC
The L133 ELIM includes five BNC connectors to connect to a DTE device that uses unbalanced TTL
signal levels; it supports only the clock and data. Use this ELIM for high speeds and long distances.
Table 5 lists the supported signals.
Table 5. TTL/BNC Signals
Signal Name Direction
RXD Receive Data Out
TXD Transmit Data In
SCR Receive Clock Out
SCT Transmit Clock Out
SCTE External Transmit Clock In