Table 44: DB-25 Connector to DB-15 (X.21) Connector Pinout
Description
DB-15 (X.21) Pin
Signal
DB-25 Pin
Protective Ground
1
FGND
1
Signal Ground
8
GND
7
Transmit Data
2
T
2
Transmit Data
9
T
14
Receive Data
4
R
3
Receive Data
11
R
16
Request To Send
3
C
4
Request To Send
10
C
19
Data Carrier Detect
5
I
8
Data Carrier Detect
12
I
10
Receive Clock
6
S
17
Receive Clock
13
S
9
Related
Documentation
Maintaining M120 PICs and PIC Cables on page 112
•
•
Installing an M120 PIC Cable on page 166
•
M120 PICs Description on page 15
M120 Fast Ethernet PIC 48-Port Cable Pinouts
The Fast Ethernet 48-port PIC has four VHDCI connector ports on its faceplate (see
Figure 99 on page 255), each of which accepts one of the four RJ-21 cables supplied with
the PIC (see Figure 100 on page 255). Each VHDCI connector port supports 12 Ethernet
ports.
Copyright © 2010, Juniper Networks, Inc.
254
M120 Multiservice Edge Router Hardware Guide
All manuals and user guides at all-guides.com