3Com SuperStack II User Manual

Also see for SuperStack II: User guide Using User guide User guide Supplement sheet

Contents

3Com SuperStack II User Manual Manual pdf 53 page image

Serial Connectors and Flex-WAN Cables 53X.21 DCE CablePinoutsThis cable connects the bridge/router to an X.21 DTE.Figure 25 Flex-WAN and X.21 DCE Connectors.Table 17 X.21 DCE Cable PinoutsFlex-WAN Connector X.21 DCE ConnectorSignal Pin Direction Pin Signal Twisted Pair** Unused twisted wires of a twisted pair should be connected to Shield Ground. In this cable thisis one wire of twisted pair 4.CTS/RTS+ 1 ← 1 Control+ 1CTS/RTS- 2 ← 2 Control-RTS/CTS+ 9 → 5 Indicate+ 2RTS/CTS- 10 → 12 Indicate-TxD/RxD+ 11 → 4 Receive+ 3TxD/RxD- 12 → 11 Receive-Circuit Ground 15 - 8 Control GND 4TxC/RxC- 23 ← 13 Timing- 5TxC/RxC+ 24 ← 6 Timing+RxD/TxD- 27 ← 9 Transmit- 6RxD/TxD+ 28 ← 2 Transmit+Shield Ground 46 Cable Shield 1 Shield Ground -Shorting Group 1 4748- - - -60-pin Flex-WAN male connectorTo SuperStack II NETBuilderTo DTE15-pin female connector1 2 3 4 5 6 7 89 10 11 12 13 14 151 2 3 4 5 6 7 8 9 10 11 12 13 14 1530 29 28 27 26 25 24 23 22 21 20 19 18 17 1631 32 33 34 35 36 37 38 39 40 41 42 43 44 4560 59 58 57 56 55 54 53 52 51 50 49 48 47 46HWBook Page 53 Friday, June 19, 1998 3:42 PM