X4000
User’s Guide
399
Features of Basic Unit
13
DB-25 Plug for X.21bis
A DB-25 plug to ISO 2110 is normally used for an X.21bis interface:
Figure 13-7:
DB-25 plug
The DB-25 plug has the following pin assignment:
Table 13-7: Pin assignment of DB-25 plug for X.21bis (ISO 2110)
DTE cable
Signal
direction
Pin no.
DCE cable
ITU-T
Signal
Signal
ITU-T
101
ChGND
––––– 1 ––––
ChGND
101
103
TD
2 ––––>
RD
104
104
RD
<––––– 3
TD
103
105
RTS
4 ––––>
CTS
106
106
CTS
<––––– 5
RTS
105
107
DSR
<––––– 6
DTR
108/2
102
SigGND
––––– 7 ––––
SigGND
102
109
DCD
<––––– 8
DCD
109
114
TxC
<––––– 15
TxC
114
115
RxC
<––––– 17
RxC
115
108/2
DTR
20 –––>
DSR
107
113
XTC
24 –––>
RxC / TxC
114/115
VCC +5V
–––– 25 –––
VCC +5V
1
7
13
14
20
25
Summary of Contents for X4000
Page 4: ...4 X4000 User s Guide...
Page 6: ...6 X4000 User s Guide Table of Contents...
Page 14: ...14 X4000 User s Guide Table of Contents...
Page 30: ...30 X4000 User s Guide Welcome 1...
Page 34: ...34 X4000 User s Guide General Safety Precautions 2...
Page 68: ...68 X4000 User s Guide Hardware Description and Installation 3...
Page 92: ...92 X4000 User s Guide Configuration Requirements 4...
Page 118: ...118 X4000 User s Guide Fast Configuration with the Configuration Wizard Basic Unit 6...
Page 362: ...362 X4000 User s Guide Configuration of Security Functions and Firewall 10...
Page 374: ...374 X4000 User s Guide Configuration Management 11...
Page 386: ...386 X4000 User s Guide Troubleshooting 12...
Page 433: ...X4000 User s Guide 433 15...
Page 449: ...X4000 User s Guide 449 15...
Page 468: ...468 X4000 User s Guide General Safety Precautions in 15 Different Languages 15...
Page 496: ...496 X4000 User s Guide Index...
Page 498: ...498 X4000 User s Guide Document 71000L Version1 3...