3Com 3C63311 - SuperStack II PathBuilder S310 Bridge/router, Справочное руководство, Страница: 34 / 262

22 C
HAPTER
1: S
YSTEM
D
ESCRIPTION
Connector type at end of
EIA530 cable
Connector pinouts
DB-25 subminiature,
female for DCE, male for DTE
A Side B Side
Chassis Ground 1
Send Data 2 14
Send Timing 15 12
Receive Data 3 16
Req to Send 4 19
Receive Timing 17 9
Clear to Send 5 13
Terminal Ready 20 23
Receiver Ready 8 10
Terminal Timing 24 11
Signal Ground 7
Connector type at end of X.21
cable
X.21 DTE cable pinouts
(60-pin connector) to
DB-15 male
DB-15 subminiature,
female for DCE, male for DTE
Signal Pin # on Pin # on Direction (for
Name 60-pin DB-15 serial port)
Frame GND 46 1
Circuit GND 15 8
RTS 9,10 3,10 OUT
CTS 1,2 5,12 IN
DSR IN
DCD (not used; tristate when in DTE mode)
DTR OUT
LL (not used) OUT
SD+ 11 2 OUT
SD- 12 9 OUT
RD+ 28 4 IN
RD- 27 11 IN
SCTE+ OUT
SCTE- OUT
SCR+ 26 6 IN
SCR- 25 13 IN
SCT+ IN
SCT- IN
Shorting
GR 1
47,48,49
Shorting
GR 2
51, 52
(continued)
Table 5 PathBuilder S310 System Specifications