User's Manual

Chapter 9 Connecting the cables 159
BCM200/400 4.0 Installation and Maintenance Guide
Table 60 shows the wire connections for a DB15 X.21 adapter cable.
Installing the cards
Refer to “Replacing data cards and processing hardware” on page 299 for the removal and
installation process for these cards.
Table 60 DB15 X.21 adapter cable
DB26 on
WAN card
Signal
DB15
X.21 cable
DB26 on
WAN card
Signal
DB15
X.21 cable
1 Chassis Ground 1 14 Transmit Data B 9
2 Transmit Data A 2 15
3 Receive Data A 4 16 Receive Data B 11
4 Request to Send A 3 17 Receive Clock A 6
5 Clear to Send A 5 18
6 19 Request To Send B 10
7 Signal Ground 8 20
8 21
9 Receive Clock B 13 22
10 23
11 External Clock B 14 24 External Clock A 7
12 25
13 Clear To Send B 12 26