Nortel Networks BCM1000 manual Replacing the cards, DB15 X.21 adapter cable

Chapter 9 Starting the system 123

Table 32 shows the wire connections for a DB15 X.21 adapter cable.

Table 32 DB15 X.21 adapter cable

DB26 on		DB15
WAN card	Signal	X.21 cable
1	Chassis Ground	1
2	Transmit Data A	2
3	Receive Data A	4
4	Request to Send A	3
5	Clear to Send A	5
6
7	Signal Ground	8
8
9	Receive Clock B	13
10
11	External Clock B	14
12
13	Clear To Send B	12

DB26 on		DB15
WAN card	Signal	X.21 cable
14	Transmit Data B	9
15
16	Receive Data B	11
17	Receive Clock A	6
18
19	Request To Send B	10
20
21
22
23
24	External Clock A	7
25
26

Replacing the cards

Refer to Chapter 19, “Replacing data cards and processing hardware,” on page 217 for instructions about removing and installing these cards.

Installation and Maintenance Guide