Enterasys csx400 安装指导
Appendix B: WPIM Cable Specifications
B-8
CyberSWITCH CSX400 and CSX400-DC Installation Guide
X.21
shows the connector number, cable assembly description, and connector type.
provides pin assignments for the X.21 interface cable.
Table B-12
X.21 Interface
Connector Number
Cable Assembly Description
Connector Type
1
EIA-530A ALT A to X.21
Sub DB 26-pin male
2
DB-15 pin male
Table B-13
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
A
2
Transmit A
DCE
T
Transmit Data B
14
9
Transmit B
BB
DTE
Receive Data A
3
B
4
Receive A
DTE
R
Receive Data B
16
11
Receive B
CB
DTE
Clear to Send A
5
C
5
Indication A
DTE
I
Clear to Send B
13
12
Indication B
CA
DCE
Request to Send A
4
D
3
Control A
DCE
C
Request to Send B
19
10
Control B
DB
DTE
Transmit Signal Timing A
Receive Signal Timing A
17
15
15
E
6
Signal 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