WPIM Cable Specifications

230 CSX400 and CSX400-DC User’s Guide

X.21

Table 44 shows the connector number, cable assembly description, and connector type.

Table 45 provides pin assignments for the X.21 interface cable.

Table 44 X.21 Interface
Connector Number Cable Assembly Description Connector Type
1EIA-530A ALT A to X.21 Sub DB 26-pin male
2 DB-15 pin male
Table 45 X.21 Interface Cable Pin Assignment
Connector 1 EIA-530A ALT A
PAIR
Connector 2 X.21
MNEMONIC DIRECT
TO NAME PIN PIN NAME DIRECT
TO MNEMONIC
BA DCE Transmit Data A 2 A2 Transmit A DCE T
Transmit Data B 14 9 Transmit B
BB DTE Receive Data A 3 B4 Receive A DTE R
Receive Data B 16 11 Receive B
CB DTE Clear to Send A 5 C5 Indication A DTE I
Clear to Send B 13 12 Indication B
CA DCE Request to Send A 4 D3 Control A DCE C
Request to Send B 19 10 Control B
DB DTE
Transmit Signal Timing A
Receive Signal Timing A 17
15 E
6Signal Element
Timing A DTE S
Transmit Signal Timing B
Receive Signal Timing B 9
12 13 Signal Element
Timing B
SHIELD 1 DRAIN
AC DTE Common 7 8 Signal Ground G
AB DCE Common 23