Table 7 Db28S-To-X.21 Cable Pinouts - Nortel Contivity 4600 Installing

Table 7 shows the DB28S-to-X.21 cable pinouts.
DB28S-to-X.21 cable pinouts
Table 7
Standard-wired end
28-pin male
2
14
3
16
15
12
17
9
24
11
4
19
5
13
6
22
20
23
8
10
18
21
25
26
27
28
1
7
The following notes apply to the Single X.21 DTE cable:
1. At each end, the cable shield and back shell must connect to pin 1 of the connector.
2. "no conn" means the wire is not connected to a pin in the 15-pin connector.
3. Wires 13B and 14B connect to pin 8 in the 15-pin connector.
4. Unused pins in the 15-pin connector need not be present.
5. Wires of pair 4 connect to wires of pair 5, but not to any pins in the DA-15. Do NOT interconnect Shield to
Signal Ground – they are separate signals.
6. The pair suffix A or B refers to an individual wire within a twisted pair.
Signal name
TXDA
TXDB
RXDA
RXDB
TXCA
TXCB
RXCB
RXCB
SCTEA
SCTEB
RTSA
RTSB
CTSA
CTSB
DSRA
DSRB
DTRB
DTRB
DCDA
DCDB
LL
RL
TM
M0
M1
M2<-SIGNAL GROUND
SHIELD
SIGNAL GROUND
Chapter 2 Cabling the Switch 33
Pair ## & Special-wired end
conductor 37-pin male
pair 1A 2
pair 1B 9
pair 2A 4
pair 2B 11
pair 3A 6
pair 3B 13
pair 4A pair 5a
pair 4B pair5b
pair 5A pair4a
pair 5B pair4b
pair 6A 3
pair 6B 10
pair 7A 12
pair 7B no conn
pair 8A no conn
pair 8B no conn
pair 9A no conn
pair 9B no conn
pair 10A no conn
pair 10B no conn
pair 11A no conn
pair 11B no conn
pair 12A no conn
pair 12B no conn
pair 13A no conn
pair 13B 8
pair 14A 1
pair 14B 8
Installing the Contivity 4600
Notes
Note 5
Note 5
Note 5
Note 5
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 2
Note 3
Note 1
Note 3