Appendix A: Cable Specifications and Information

Available Languages

Download Options

  • PDF     (546.7 KB)
    View with Adobe Reader on a variety of devices
Updated:October 11, 2004

Bias-Free Language

The documentation set for this product strives to use bias-free language. For the purposes of this documentation set, bias-free is defined as language that does not imply discrimination based on age, disability, gender, racial identity, ethnic identity, sexual orientation, socioeconomic status, and intersectionality. Exceptions may be present in the documentation due to language that is hardcoded in the user interfaces of the product software, language used based on RFP documentation, or language that is used by a referenced third-party product. Learn more about how Cisco is using Inclusive Language.

Cable Specifications and Information

Table Of Contents

Cable Specifications and Information

Console and Auxiliary Port Cables and Pinouts

Identifying a Rollover Cable

Console Port to PC

Console Port to ASCII Terminal

Auxiliary Port to Modem

Alternative Connections to Terminal and Modem

Serial Cable Assemblies and Pinouts

EIA/TIA-530

EIA/TIA-530A

EIA/TIA-232

EIA/TIA-449

V.35

X.21

Fast Ethernet Port Pinouts (RJ-45)

T1/E1-WAN and T1/E1-PBX Port Pinouts (RJ-48C/CA81A)

Analog Voice Multiport Pinouts (RJ-21X/CA21A)

Synchronous Serial Interface Cable Information

DTE or DCE

Signaling Standards

EIA/TIA-232 Connections

EIA/TIA-449 Connections

V.35 Connections

X.21 Connections

EIA/TIA-530 Connections


Cable Specifications and Information

This appendix provides the connector and pinout information you need for making or purchasing cables used with Cisco IADs and contains the following sections:

•Console and Auxiliary Port Cables and Pinouts

•Serial Cable Assemblies and Pinouts

•Fast Ethernet Port Pinouts (RJ-45)

•T1/E1-WAN and T1/E1-PBX Port Pinouts (RJ-48C/CA81A)

•Analog Voice Multiport Pinouts (RJ-21X/CA21A)

•Synchronous Serial Interface Cable Information

The following list shows you which table to see for pinout information:

Cisco IAD Port and Connection Type
Pinout Information

Console Port to PC—Cable Pinouts (RJ-45 to DB-9)

Table A-1

Console Port to ASCII Terminal—Cable Pinouts (RJ-45 to DB-25)

Table A-2

Auxiliary Port to Modem—Cable Pinouts (RJ-45 to DB-25)

Table A-3

Alternative Terminal and Modem Connections

Table A-4

EIA/TIA-530 DTE Cable Pinouts (Cisco 12-in-1 to DB-25)

Table A-5

EIA/TIA-530 DCE Cable Pinouts (Cisco 12-in-1 to DB-25)

Table A-6

EIA/TIA-530A DTE Cable Pinouts (Cisco 12-in-1 to DB-25)

Table A-7

EIA/TIA-530A DCE Cable Pinouts (Cisco 12-in-1 to DB-25)

Table A-8

EIA/TIA-232 DTE Cable Pinouts (Cisco 12-in-1 to DB-25)

Table A-9

EIA/TIA-232 DCE Cable Pinouts (Cisco 12-in-1 to DB-25)

Table A-10

EIA/TIA-449 DTE Cable Pinouts (Cisco 12-in-1 to DB-37)

Table A-11

EIA/TIA-449 DCE Cable Pinouts (Cisco 12-in-1 to DB-37)

Table A-12

V.35 DTE Cable Pinouts (Cisco 12-in-1 to 34-Pin)

Table A-13

V.35 DCE Cable Pinouts (Cisco 12-in-1 to 34-Pin)

Table A-14

X.21 DTE Cable Pinouts (Cisco 12-in-1 to DB-15)

Table A-15

X.21 DCE Cable Pinouts (Cisco 12-in-1 to DB-15)

Table A-16

Fast Ethernet Port Pinouts (RJ-45)

Table A-17

Pinouts for T1/E1-WAN and T1/E1-PBX Ports (RJ-48C/CA81A)

Table A-18

Pinouts for FXS RJ-21X/CA21A)

Table A-19


To order cables from Cisco, see the "Obtaining Technical Assistance" section on page xviii.

Console and Auxiliary Port Cables and Pinouts

Your Cisco IAD comes with the cable and adapters you need to connect a PC, an ASCII terminal, or a modem to your Cisco IAD. The cable kit includes:

•RJ-45-to-RJ-45 rollover cable

•RJ-45-to-DB-9 adapter cable for console connection

•RJ-45-to-DB-25 adapter cable for modem connection

The following illustrations and tables provide cable pinout information:

•Console port to a PC—See Table A-1 and Table A-4

•Console port to an ASCII terminal—See Table A-2 and Table A-4

•Auxiliary port to a modem—See Table A-3 and Table A-4

The console port is configured as data communications equipment (DCE); the auxiliary port is configured as data terminal equipment (DTE). Both are asynchronous serial ports and use RJ-45 connectors.

Identifying a Rollover Cable

You can identify a rollover cable by holding the plugs side by side, with the tab at the back and comparing the modular plugs at the two ends of the cable. The wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug. (See Figure A-1.)

If your cable comes from Cisco Systems, pin 1 is white on one plug, and pin 8 is white on the opposite plug. (A rollover cable reverses the wire connections at the opposite ends: 1 to 8, 2 to 7, 3 to 6, 4 to 5, 5 to 4, 6 to 3, 7 to 2, and 8 to 1.)

Figure A-1 Identifying a Rollover Cable

Console Port to PC

Figure A-2 shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-9 female DTE adapter (labeled TERMINAL); Table A-1 lists the pinouts.

Figure A-2 Console Port to PC—Cable and Adapter

Table A-1 Console Port to PC—Cable Pinouts (RJ-45 to DB-9)

Console Port
(DCE, RJ-45)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-9
Adapter "TERMINAL"
PC Port
(DTE, DB-9)
Signal
RJ-45 Pin
RJ-45 Pin
RJ-45 Pin
DB-9 Pin
Signal

RTS

11

8

8

8

CTS

DTR

2

7

7

6

DSR

TxD

3

6

6

2

RxD

GND

4

5

5

5

GND

GND

5

4

4

5

GND

RxD

6

3

3

3

TxD

DSR

7

2

2

4

DTR

CTS

81

1

1

7

RTS

1 Pin 1 is connected to pin 8 inside the Cisco IAD.


Console Port to ASCII Terminal

Figure A-3 shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-25 female DTE adapter (labeled TERMINAL); Table A-2 lists the pinouts.

Figure A-3 Console Port to ASCII Terminal—Cable and Adapter

Table A-2 Console Port to ASCII Terminal—Cable Pinouts (RJ-45 to DB-25)

Console Port
(DCE, RJ-45)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Adapter "TERMINAL"
Terminal Port
(DTE, DB-25)
Signal
RJ-45 Pin
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal

RTS

11

8

8

5

CTS

DTR

2

7

7

6

DSR

TxD

3

6

6

3

RxD

GND

4

5

5

7

GND

GND

5

4

4

7

GND

RxD

6

3

3

2

TxD

DSR

7

2

2

20

DTR

CTS

81

1

1

4

RTS

1 Pin 1 is connected to pin 8 inside the Cisco IAD.


Auxiliary Port to Modem

Figure A-4 shows the RJ-45-to-RJ-45 rollover cable assembly and the RJ-45-to-DB-25 male DCE adapter (labeled MODEM); Table A-3 lists the pinouts.

Figure A-4 Auxiliary Port to Modem—Cable and Adapter

Table A-3 Auxiliary Port to Modem—Cable Pinouts (RJ-45 to DB-25)

Auxiliary Port
(DTE, RJ-45)
RJ-45-to-RJ-45
Rollover Cable
RJ-45-to-DB-25
Adapter "MODEM"
Modem Port
(DCE, DB-25)
Signal
RJ-45 Pin
RJ-45 Pin
RJ-45 Pin
DB-25 Pin
Signal

RTS

1

8

8

4

RTS

DTR

2

7

7

20

DTR

TxD

3

6

6

2

TxD

GND

4

5

5

7

GND

GND

5

4

4

7

GND

RxD

6

3

3

3

RxD

DSR

7

2

2

8

DCD

CTS

8

1

1

5

CTS


Alternative Connections to Terminal and Modem

Your Cisco IAD ships with an RJ-45-to-RJ-45 rollover cable and two adapters for connection to a PC, a terminal, or a modem. If you want to use an RJ-45 straight-through cable or other adapters, see Table A-4 for usable cable and adapter combinations.

Table A-4 Alternative Terminal and Modem Connections

Cisco IAD Port Connection
RJ-45 Cable Type
Adapter

Console port to PC

Straight-through

DCE, DB-9 female

Auxiliary port to modem

Rollover1

DCE2 , DB-25, male

 

Straight-through

DTE2, DB-25, male

1 An octal cable or RJ-45 breakout cable is equivalent to a rollover cable.

2 Modify the DB-25 adapter by removing the wire in pin 6 and placing it in the pin 8 position.


Serial Cable Assemblies and Pinouts

The following illustrations and tables provide assembly drawings and pinouts for the EIA/TIA-530 DCE, EIA/TIA-232, EIA/TIA-449, V.35, and X.21 DTE and DCE cables. These cables are used with the synchronous serial port, labeled SERIAL 0.

Note These serial cables have a Cisco 12-in-1 connector on the Cisco IAD end.

EIA/TIA-530

Figure A-6 shows the EIA/TIA-530 serial cable assembly; Table A-7 lists the DTE pinouts; Table A-8 lists the DCE pinouts. Arrows indicate signal direction.

Figure A-5 EIA-530 Serial Cable Assembly

Table A-5 EIA/TIA-530 DTE Cable Pinouts (Cisco 12-in-1 to DB-25) 1  

J1
Signal
Description
Direction
J2
Signal

J1-21
J1-23
J1-24

MODE_2
MODE_0
MODE_DCE

Local connections

-

-

-

-

-

Shield

-

J2-1

Shield GND

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 5

——>
——>

J2-2
J2-14

BA(A), TxD+
BA(B), TxD-

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 9

<——
<——

J2-3
J2-16

BB(A), RxD+
BB(B), RxD-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 1

——>
——>

J2-4
J2-19

CA(A), RTS+
CA(B), RTS-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 4

<——
<——

J2-5
J2-13

CB(A), CTS+
CB(B), CTS-

J1-12
J1-25

I_DSR/DTR+
I_DSR/DTR-

Twisted pair no. 10

<——
—

J2-6

CC(A), DSR+
AC; GND

J1-6
J1-19

IO_DCD/DCD+
IO_DCD/DCD-

Twisted pair no. 11

<——
<——

J2-8
J2-10

CF(A), DCD+
CF(B), DCD-

J1-3
J1-16

IO_TxC/RxC+
IO_TxC/RxC-

Twisted pair no. 7

<——
<——

J2-15
J2-12

DB(A), TxC+
DB(B), TxC-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 8

<——
<——

J2-17
J2-9

DD(A), RxC+
DD(B), RxC-

J1-13
J1-26

O_LL/DCD
Circuit GND

Twisted pair no. 12

——>
—

J2-18
J2-7

LL
AB; GND

J1-7
J1-20

O_DTR/DSR+
O_DTR/DSR-

Twisted pair no. 3

——>
—

J2-20
J2-23

CD(A), DTR+
AC; GND

J1-2
J1-15

O_TxCE/TxC+
O_TxCE/TxC-

Twisted pair no. 6

——>
——>

J2-24
J2-11

DA(A), TxCE+
DA(B), TxCE-

-

-

Twisted pair no. 2

-

-

Not used

1 Any pin not referenced is not connected.


Table A-6 EIA/TIA-530 DCE Cable Pinouts (Cisco 12-in-1 to DB-25) 1  

J1
Signal
Description
Direction
J2
Signal

J1-21
J1-23

MODE_2
MODE_0

Local Connections

-

-

-

-

-

Shield

-

J2-1

Shield GND

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 5

<——
<——

J2-2
J2-14

BA(A), TxD+
BA(B), TxD-

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 9

——>
——>

J2-3
J2-16

BB(A), RxD+
BB(B), RxD-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 1

<——
<——

J2-4
J2-19

CA(A), RTS+
CA(B), RTS-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 4

——>
——>

J2-5
J2-13

CB(A), CTS+
CB(B), CTS-

J1-7
J1-20

O_DTR/DSR+
O_DTR/DSR-

Twisted pair no. 10

——>
——>

J2-6
J2-22

CC(A), DSR+
CC(B), DSR-

J1-6
J1-19

IO_DCD/DCD+
IO_DCD/DCD-

Twisted pair no. 11

——>
——>

J2-8
J2-10

CF(A), DCD+
CF(B), DCD-

J1-3
J1-16

O_TxCE/TxC+
O_TxCE/TxC-

Twisted pair no. 7

——>
——>

J2-15
J2-12

DB(A), TxC+
DB(B), TxC-

J1-2
J1-15

IO_TxC/RxC+
IO_TxC/RxC-

Twisted pair no. 8

——>
——>

J2-17
J2-9

DD(A), RxC+
DD(B), RxC-

J1-13
J1-26

I_NIL/LL
Circuit GND

Twisted pair no. 12

<——
——

J2-18
J2-7

LL
AB; GND

J1-12
J1-25

I_DSR/DTR+
I_DSR/DTR-

Twisted pair no. 3

<——
<——

J2-20
J2-23

CD(A), DTR+
AC; GND

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 6

<——
<——

J2-24
J2-11

DA(A), TxCE+
DA(B), TxCE-

-

-

Twisted pair no. 2

-

-

Not used

1 Any pin not referenced is not connected.


EIA/TIA-530A

Figure A-6 shows the EIA/TIA-530A serial cable assembly; Table A-7 lists the DTE pinouts; Table A-8 lists the DCE pinouts. Arrows indicate signal direction.

Figure A-6 EIA-530A Serial Cable Assembly

Table A-7 EIA/TIA-530A DTE Cable Pinouts (Cisco 12-in-1 to DB-25) 1  

J1
Signal
Description
Direction
J2
Signal

J1-21
J1-22
J1-24

MODE_2
MODE_1
MODE_DCE

Local connections

-

-

-

-

-

Shield

-

J2-1

Shield GND

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 5

——>
——>

J2-2
J2-14

BA(A), TxD+
BA(B), TxD-

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 9

<——
<——

J2-3
J2-16

BB(A), RxD+
BB(B), RxD-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 1

——>
——>

J2-4
J2-19

CA(A), RTS+
CA(B), RTS-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 4

<——
<——

J2-5
J2-13

CB(A), CTS+
CB(B), CTS-

J1-12
J1-25

I_DSR/DTR+
I_DSR/DTR-

Twisted pair no. 10

<——
—

J2-6

CC(A), DSR+
AC; GND

J1-6
J1-19

IO_DCD/DCD+
IO_DCD/DCD-

Twisted pair no. 11

<——
<——

J2-8
J2-10

CF(A), DCD+
CF(B), DCD-

J1-3
J1-16

IO_TxC/RxC+
IO_TxC/RxC-

Twisted pair no. 7

<——
<——

J2-15
J2-12

DB(A), TxC+
DB(B), TxC-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 8

<——
<——

J2-17
J2-9

DD(A), RxC+
DD(B), RxC-

J1-13
J1-26

O_LL/DCD
Circuit GND

Twisted pair no. 12

——>
—

J2-18
J2-7

LL
AB; GND

J1-7
J1-20

O_DTR/DSR+
O_DTR/DSR-

Twisted pair no. 3

——>
—

J2-20
J2-23

CD(A), DTR+
AC; GND

J1-2
J1-15

O_TxCE/TxC+
O_TxCE/TxC-

Twisted pair no. 6

——>
——>

J2-24
J2-11

DA(A), TxCE+
DA(B), TxCE-

-

-

Twisted pair no. 2

-

-

Not used

1 Any pin not referenced is not connected.


Table A-8 EIA/TIA-530A DCE Cable Pinouts (Cisco 12-in-1 to DB-25) 1  

J1
Signal
Description
Direction
J2
Signal

J1-21
J1-22

MODE_2
MODE_1

Local Connections

-

-

-

-

-

Shield

-

J2-1

Shield GND

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 5

<——
<——

J2-2
J2-14

BA(A), TxD+
BA(B), TxD-

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 9

——>
——>

J2-3
J2-16

BB(A), RxD+
BB(B), RxD-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 1

<——
<——

J2-4
J2-19

CA(A), RTS+
CA(B), RTS-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 4

——>
——>

J2-5
J2-13

CB(A), CTS+
CB(B), CTS-

J1-7
J1-20

O_DTR/DSR+
O_DTR/DSR-

Twisted pair no. 10

——>
——>

J2-6

CC(A), DSR+
AC; GND

J1-6
J1-19

IO_DCD/DCD+
IO_DCD/DCD-

Twisted pair no. 11

——>
——>

J2-8
J2-10

CF(A), DCD+
CF(B), DCD-

J1-3
J1-15

O_TxCE/TxC+
O_TxCE/TxC-

Twisted pair no. 7

——>
——>

J2-15
J2-12

DB(A), TxC+
DB(B), TxC-

J1-2
J1-15

IO_TxC/RxC+
IO_TxC/RxC-

Twisted pair no. 8

——>
——>

J2-17
J2-9

DD(A), RxC+
DD(B), RxC-

J1-13
J1-26

I_NIL/LL
Circuit GND

Twisted pair no. 12

<——
——

J2-18
J2-7

LL
AB; GND

J1-12
J1-25

I_DSR/DTR+
I_DSR/DTR-

Twisted pair no. 3

<——
<——

J2-20
J2-23

CD(A), DTR+
AC; GND

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 6

<——
<——

J2-24
J2-11

DA(A), TxCE+
DA(B), TxCE-

-

-

Twisted pair no. 2

-

-

Not used

1 Any pin not referenced is not connected.


EIA/TIA-232

Figure A-7 shows the EIA/TIA-232 cable assembly; Table A-9 lists the DTE pinouts; Table A-10 lists the DCE pinouts. Arrows indicate signal direction.

Figure A-7 EIA/TIA-232 Cable Assembly

Table A-9 EIA/TIA-232 DTE Cable Pinouts (Cisco 12-in-1 to DB-25) 1  

J1
Signal
Description
Direction
J2
Signal

J1-23
J1-24

MODE_0
MODE_DCE

Local connections

-

-

-

-

-

Shield

-

J2-1

Shield GND

J1-1
J1-14

O_TxD/RxD+
GND

Twisted pair no. 5

——>
—

J2-2

TxD
GND

J1-5
J1-18

I_RxD/TxD
GND

Twisted pair no. 9

<——
—

J2-3

RxD
GND

J1-8
J1-7

O_CTS/RTS+
O_DTR/DSR+

Twisted pair no. 4

——>
——>

J2-4
J2-20

RTS
DTR

J1-11
J1-12

1_RTS/CTS+
1_DTR/DSR+

Twisted pair no. 2

<——
<——

J2-5
J2-6

CTS
DSR

J1-6
J1-19

B_DCD/DCD+
GND

Twisted pair no. 1

<——
—

J2-8
J2-7

DCD
GND

J1-3
J1-16

B_TXC/TXC+
Circuit GND

Twisted pair no. 7

<——
—

J2-15

TXC
GND

J1-4
J1-17

I_RXC/TXCE+
GND

Twisted pair no. 8

<——
—

J2-17

RXC
GND

J1-13
J1-26

B_LL/LL+
GND

Twisted pair no. 3

——>
—

J2-18

LTST
GND

J1-2
J1-15

O_TxCE/RXC+
GND

Twisted pair no. 6

——.
—

J2-24

TxCE
GND

1 Any pin not referenced is not connected.


Table A-10 EIA/TIA-232 DCE Cable Pinouts (Cisco 12-in-1 to DB-25) 1  

J1
Signal
Description
Direction
J2
Signal

J1-23

MODE_0

Local connections

-

-

-

-

-

Shield

-

J2-1

Shield GND

J1-5
J1-18

I_RxD/TxD
GND

Twisted pair no. 5

<——
—

J2-2

RxD
GND

J1-1
J1-14

O_TxD/RxD+
GND

Twisted pair no. 9

——>
—

J2-3

TxD
GND

J1-11
J1-12

1_RTS/CTS+
1_DTR/DSR+

Twisted pair no. 2

<——
<——

J2-4
J2-20

CTS
DSR

J1-8
J1-7

O_CTS/RTS+
O_DTR/DSR+

Twisted pair no. 4

——>
——>

J2-5
J2-6

RTS
DTR

J1-6
J1-19

B_DCD/DCD+
GND

Twisted pair no. 1

——>
—

J2-8
J2-7

DCD
GND

J1-3
J1-16

B_TXC/TXC+
Circuit GND

Twisted pair no. 7

——>
—

J2-15

TXC
GND

J1-2
J1-15

O_TxCE/RXC+
GND

Twisted pair no. 8

——>
—

J2-17

TxCE
GND

J1-13
J1-26

B_LL/LL+
GND

Twisted pair no. 3

<——
—

J2-18

LTST
GND

J1-4
J1-17

I_RXC/TXCE+
GND

Twisted pair no. 6

<——
—

J2-24

RXC
GND

1 Any pin not referenced is not connected.


EIA/TIA-449

Figure A-8 shows the EIA/TIA-449 cable assembly; Table A-11 lists the DTE pinouts; Table A-12 lists the DCE pinouts. Arrows indicate signal direction.

Figure A-8 EIA/TIA-449 Cable Assembly

Table A-11 EIA/TIA-449 DTE Cable Pinouts (Cisco 12-in-1 to DB-37) 1  

J1
Signal
Description
Direction
J2
Signal

-

-

Shield

—

J2-1

Shield GND

J1-22
J1-24

MODE_1
MODE_DCE

Twisted pair no. 2

—
—>

J2-19
J2-20

SG
RC

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 5

——>
——>

J2-4
J2-22

SD+
SD-

J1-3
J1-16

B_TxC/TxC+
B_TxC/TxC-

Twisted pair no. 7

<——
<——

J2-5
J2-23

ST+
ST-

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 9

<——
<——

J2-6
J2-24

RD+
RD-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 1

——>
——>

J2-7
J2-25

RS+
RS-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 8

<——
<——

J2-8
J2-26

RT+
RT-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 4

<——
<——

J2-9
J2-27

CS+
CS-

J1-13
J1-26

B_LL/LL
GND

Twisted pair no. 12

——>
—

J2-10
J2-37

LL
SC

J1-12
J1-25

I_DSR/DTR+
I_DSR/DTR-

Twisted pair no. 10

<——
<——

J2-11
J2-29

DM+
DM-

J1-7
J1-20

O_DTR/DSR+
O_DTR/DSR-

Twisted pair no. 3

——>
——>

J2-12
J2-30

TR+
TR-

J1-6
J1-19

B_DCD/DCD+
B_DCD/DCD-

Twisted pair no. 6

<——
<——

J2-13
J2-31

RR+
RR-

J1-2
J1-15

O_TxCE/TxC+
O_TxCE/TxC-

Twisted pair no. 6

——>
——>

J2-17
J2-35

TT+
TT-

1 Any pin not referenced is not connected.


Table A-12 EIA/TIA-449 DCE Cable Pinouts (Cisco 12-in-1 to DB-37) 1  

J1
Signal
Description
Direction
J2
Signal

-

-

Shield

—

J2-1

Shield GND

J1-22

MODE_1

Twisted pair no. 2

-

J2-19
J2-20

SG
RC

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 5

<——
<——

J2-4
J2-22

SD+
SD-

J1-3
J1-16

O_TxCE/TxC+
O_TxCE/TxC-

Twisted pair no. 9

——>
——>

J2-5
J2-23

ST+
ST-

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 9

——>
——>

J2-6
J2-24

RD+
RD-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 1

<——
<——

J2-7
J2-25

RS+
RS-

J1-2
J1-15

O_TxC/RxC+
O_TxC/RxC-

Twisted pair no. 8

——>
——>

J2-8
J2-26

RT+
RT-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 4

——>
——>

J2-9
J2-27

CS+
CS-

J1-13
J1-26

B_LL/LL+
Circuit GND

Twisted pair no. 12

——>
—

J2-10
J2-37

LL
SC

J1-7
J1-20

O_DTR/DSR+
O_DTR/DSR-

Twisted pair no. 10

——>
——>

J2-11
J2-29

DM+
DM-

J1-12
J1-25

I_DSR/DTR+
I_DSR/DTR-

Twisted pair no. 3

<——
<——

J2-12
J2-30

TR+
TR-

J1-6
J1-19

B_DCD/DCD+
B_DCD/DCD-

Twisted pair no. 11

——>
——>

J2-13
J2-31

RR+
RR-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 6

<——
<——

J2-17
J2-35

TT+
TT-

1 Any pin not referenced is not connected.


V.35

Figure A-9 shows the V.35 cable assembly; Table A-13 lists the DTE pinouts; Table A-14 lists the DCE pinouts.

Figure A-9 V.35 Cable Assembly

Table A-13 V.35 DTE Cable Pinouts (Cisco 12-in-1 to 34-Pin) 1  

J1
Signal
Description
Direction
J2
Signal

J1-22
J1-23
J1-24

MODE_1
MODE_0
MODE_DCE

Local connections

-

-

-

-

-

Shield

—

J2-A

Shield GND

J1-8
J1-7

O_RTS/CTS+
O_DTR/DSR+

Twisted pair no. 4

——>
——>

J2-C
J2-H

RTS
DTR

J1-11
J1-12

I_CTS/RTS+
I_DSR/DTR+

Twisted pair no. 2

<——
<——

J2-D
J2-E

CTS
DSR

J1-6
J1-19

B_DSR/DTR+
GND

Twisted pair no. 1

<——
—

J2-F

RLSD
GND

J1-13
J1-26

B_LL/LL+
GND

Twisted pair no. 3

——>
—

J2-K
J2-B

LT
GND

J1-1
J1-14

O_TxC/RxD+
O_TxD/RxD-

Twisted pair no. 5

——>
——>

J2-P
J2-S

SD+
SD-

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 9

<——
<——

J2-R
J2-T

RD+
RD-

J1-2
J1-15

O_TxCE/RxC+
O_TxCE/RxC-

Twisted pair no. 6

——>
——>

J2-U
J2-W

SCTE+
SCTE-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 8

<——
<——

J2-V
J2-X

SCR+
SCR-

J1-3
J1-16

B_TxC/TxC+
B_TxC/TxC-

Twisted pair no.7

<——
<——

J2-Y
J2-AA

SCT+
SCT-

1 Any pin not referenced is not connected.


Table A-14 V.35 DCE Cable Pinouts (Cisco 12-in-1 to 34-Pin) 1  

J1
Signal
Description
Direction
J2
Signal

J1-22
J1-23

MODE_1
MODE_0

Local connections

-

-

-

-

-

Shield

—

J2-A

Shield GND

J1-11
J1-12

I_CTS/RTS+
I_DSR/DTR+

Twisted pair no. 4

<——
<——

J2-C
J2-H

RTS
DTR

J1-8
J1-7

O_RTS/CTS+
O_DTR/DSR+

Twisted pair no. 2

——>
——>

J2-D
J2-E

CTS
DSR

J1-6
J1-19

B_DCD/DCD+
GND

Twisted pair no. 1

——>
—

J2-F

RLSD
GND

J1-13
J1-26

B_LL/LL+
GND

Twisted pair no. 3

<——
—

J2-K
J2-B

LT
GND

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 5

<——
<——

J2-P
J2-S

SD+
SD-

J1-1
J1-14

O_TxC/RxD+
O_TxD/RxD-

Twisted pair no. 9

——>
——>

J2-R
J2-T

RD+
RD-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 6

<——
<——

J2-U
J2-W

SCTE+
SCTE-

J1-2
J1-15

O_TxCE/RxC+
O_TxCE/RxC-

Twisted pair no. 8

——>
——>

J2-V
J2-X

SCR+
SCR-

J1-3
J1-16

B_TxC/TxC+
B_TxC/TxC-

Twisted pair no.7

——>
——>

J2-Y
J2-AA

SCT+
SCT-

1 Any pin not referenced is not connected.


X.21

Figure A-10 shows the X.21 cable assembly; Table A-15 lists the DTE pinouts; Table A-16 lists the DCE pinouts. Arrows indicate signal direction.

Figure A-10 X.21 Cable Assembly

Table A-15 X.21 DTE Cable Pinouts (Cisco 12-in-1 to DB-15) 1  

J1
Signal
Description
Direction
J2
Signal

J1-21
J1-24

MODE_1
MODE_0

Local connections

-

-

-

-

-

Shield

—

J2-1

Shield GND

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 5

——>
——>

J2-2
J2-9

Transmit+
Transmit-

J1-8
J1-9

O_RTS/CTS+
O_RTS/CTS-

Twisted pair no. 3

——>
——>

J2-3
J2-10

Control+
Control-

J1-5
J1-18

I_RxD/TxD+
I_RxD/TxD-

Twisted pair no. 8

<——
<——

J2-4
J2-11

Receive+
Receive-

J1-11
J1-10

I_CTS/RTS+
I_CTS/RTS-

Twisted pair no. 2

<——
<——

J2-5
J2-12

Indication+
Indication-

J1-4
J1-17

I_RxC/TxCE+
I_RxC/TxCE-

Twisted pair no. 7

<——
<——

J2-6
J2-13

Timing+
Timing-

J1-26

Circuit GND

Twisted pair2 no. 1

—

J2-8

Circuit GND

1 Any pin not referenced is not connected.

2 Twisted pairs 4, 6, and 9 are not used.


Table A-16 X.21 DCE Cable Pinouts (Cisco 12-in-1 to DB-15) 1  

J1
Signal
Description
Direction
J2
Signal

J1-21

MODE_2

Local connections

-

-

-

-

-

Shield

—

J2-1

Shield GND

J1-5
J1-8

I_RxT/TxD+
I_RxD/TxD-

Twisted pair no. 5

<——
<——

J2-2
J2-9

Transmit+
Transmit-

J1-11
J1-10

I_RTS/CTS+
I_RTS/CTS-

Twisted pair no. 3

<——
<——

J2-3
J2-10

Control+
Control-

J1-1
J1-14

O_TxD/RxD+
O_TxD/RxD-

Twisted pair no. 8

——>
——>

J2-4
J2-11

Receive+
Receive-

J1-8
J1-9

O_CTS/RTS+
O_CTS/RTS-

Twisted pair no. 2

——>
——>

J2-5
J2-12

Indication+
Indication-

J1-2
J1-15

O_RxC/TxCE+
O_RxC/TxCE-

Twisted pair no. 7

——>
——>

J2-6
J2-13

Timing+
Timing-

J1-26

Circuit GND

Twisted pair2 no. 1

—

J2-8

Circuit GND

1 Any pin not referenced is not connected.

2 Twisted pairs 4, 6, and 9 are not used.


Fast Ethernet Port Pinouts (RJ-45)

Figure A-11 shows the RJ-45 connector wiring for the Fast Ethernet cable; Figure A-11 lists the pinouts.

Note Pinout shown is for category 3, 4, or 5 10/100BASE-T connection to a Fast Ethernet switch.

Figure A-11 RJ-45 Connector Wiring

Table A-17 Fast Ethernet Port Pinouts (RJ-45) 

Pin 1
Signal

1

TX+

2

TX-

3

RX+

4

-

5

-

6

RX-

7

-

8

-

1 Any pin not referenced is not connected.


T1/E1-WAN and T1/E1-PBX Port Pinouts (RJ-48C/CA81A)

Figure A-12 shows the RJ-48 connector wiring for the T1/E1 trunk cable and the digital voice port cable; Table A-18 lists the pinouts.

Figure A-12 RJ-48 Connector Wiring

Table A-18 Pinouts for T1/E1-WAN and T1/E1-PBX Ports (RJ-48C/CA81A)

Pin 1
Signal

1

RX (input)

2

RX (input)

3

-

4

TX (output)

5

TX (output)

6

-

7

-

8

-

1 Any pin not referenced is not connected.


Analog Voice Multiport Pinouts (RJ-21X/CA21A)

Figure A-13 shows the RJ-21 connector wiring for the cable used for the multiport analog voice interface; Table A-19 lists the pinouts.

Figure A-13 RJ-21 Connector Wiring

Table A-19 Pinouts for FXS RJ-21X/CA21A) 

Interface Type
Analog Voice Line
Tip Conductor
Ring Conductor
Analog Voice Line
Tip Conductor
Ring Conductor

FXS

1

26

1

13

38

13

2

27

2

14

39

14

3

28

3

15

40

15

4

29

4

16

41

16

5

30

5

17

42

17

6

31

6

18

43

18

7

32

7

19

44

19

8

33

8

20

45

20

9

34

9

21

46

21

10

35

10

22

47

22

11

36

11

23

48

23

12

37

12

24

49

24


Synchronous Serial Interface Cable Information

DTE or DCE

A device that communicates over a synchronous serial interface is either a DTE or DCE device. A DCE device provides a clock signal; a DTE device does not provide a clock signal. DTE devices usually connect to DCE devices. The documentation that shipped with the device should indicate whether it is a DTE or DCE device. (Some devices have a jumper to select either mode.) If you cannot find the information in the documentation, refer to Table A-20 to help you select the proper device type. The synchronous serial ports on a Cisco IAD can be configured as DTE or DCE (opposite to the device being connected).

Table A-20 Typical DTE and DCE Devices

Device Type
Connector Gender at Device
Typical Devices

DTE

Male1

•Terminal

•PC

•Multiservice access concentrator

DCE

Female2

•Modem

•CSU/DSU3

•Multiplexer

1 If pins protrude from the face of the connector, the connector is male.

2 If the connector face has holes to accept pins, the connector is female.

3 CSU/DSU-channel service unit/data service unit.


Signaling Standards

The synchronous serial port supports the following signaling standards: EIA/TIA-232, EIA/TIA-449, V.35, X.21, EIA/TIA-530, and EIA/TIA-530A. You can order a shielded serial transition cable for your application. One end of this cable has a Cisco 12-in-1 connector, which connects to one of the serial ports on the WIC in your Cisco IAD. The other end has the connector required for the signaling standard being used. The documentation for the device you want to connect to should indicate the standard used for that device.

Note All serial ports that are configured as DTE require external clocking from a CSU/DSU or other DCE device.

Figure A-14 shows the serial transition cables you can connect to the serial port on the WIC used in your Cisco IAD.

Figure A-14 Serial Transition Cables

Although attempting to manufacture your own serial cables is not recommended, cable pinouts are provided in the "Serial Cable Assemblies and Pinouts" section. To order a cable, see the "Obtaining Technical Assistance" section on page xviii.

Timesaver We recommend that you use the standard Cisco cables shown in Figure A-14 to ensure quick and trouble-free interconnection of serial devices.

EIA/TIA-232 Connections

The EIA/TIA-232 standard supports unbalanced circuits at signal speeds up to 64 kbps.

For connection to a Cisco IAD serial port, use the EIA/TIA-232 serial transition cable with the Cisco 12-in-1 connector on one end and a DB-25 connector (as shown in Figure A-15) on the other. The DB-25 connector can be male for DTE or female for DCE. To order a cable, see the "Obtaining Technical Assistance" section on page xviii.

Figure A-15 EIA/TIA-232 Serial Transition Cable Connectors

EIA/TIA-449 Connections

The EIA/TIA-449 standard, which supports balanced and unbalanced transmissions, is a faster (up to 2 Mbps) version of the EIA/TIA-232 standard that provides more functions and supports transmission over greater distances.

The EIA/TIA-449 standard was intended to replace the EIA/TIA-232 standard. However, this standard was not widely adopted because of the large installed base of DB-25 hardware. Also, the larger size of the 37-pin EIA/TIA-449 connectors limited the number of connections possible (fewer than are possible with the smaller, 25-pin EIA/TIA-232 connector).

To make a connection to a Cisco IAD serial port, use the EIA/TIA-449 serial transition cable with the Cisco 12-in-1 connector on one end and a DB-37 connector (as shown in Figure A-16) on the other. The DB-37 connector can be male for DTE or female for DCE. To order a cable, see the "Obtaining Technical Assistance" section on page xviii.

Figure A-16 EIA/TIA-449 Serial Transition Cable Connectors

V.35 Connections

The V.35 standard is recommended for speeds up to 48 kbps, although in practice it is used successfully at 4 Mbps. The Cisco IAD supports speeds up to 2.048 Mbps.

Use the V.35 serial transition cable (not included) with the Cisco 12-in-1 connector on one end and a standard 34-pin Winchester-type connector (as shown in Figure A-17) on the other. The 34-pin Winchester-type connector can be male for DTE or female for DCE. To order a cable, see the "Obtaining Technical Assistance" section on page xviii.

Figure A-17 V.35 Serial Transition Cable Connectors

X.21 Connections

The X.21 connector uses a 15-pin connector for balanced circuits and is commonly used in the United Kingdom to connect to the public data network. X.21 relocates some of the logic functions to the DTE and DCE interfaces and, as a result, requires fewer circuits and a smaller connector than EIA/TIA-232.

Use the X.21 serial transition cable (not included) with the Cisco 12-in-1 connector on one end and a DB-15 connector (as shown in Figure A-18) on the other. The DB-15 connector can be male for DTE or female for DCE. To order a cable, see the "Obtaining Technical Assistance" section on page xviii.

Figure A-18 X.21 Serial Transition Cable Connectors

EIA/TIA-530 Connections

The EIA/TIA-530 standard, which supports balanced transmission, provides the increased functionality, speed, and distance of EIA/TIA-449 on the smaller, DB-25 connector used for EIA/TIA-232. Like EIA/TIA-449, EIA/TIA-530 refers to the electrical specifications of EIA/TIA-422 and EIA/TIA-423. Although the specification recommends a maximum speed of 2 Mbps, EIA/TIA-530 is used successfully at 4 Mbps or faster speeds over short distances. Cisco IADs support speeds up to 2.048 Mbps.

Use the EIA/TIA-530 serial transition cable (not included) with the Cisco 12-in-1 connector on one end and a DB-25 connector (as shown in Figure A-19) on the other. The DB-25 connector can be male for DTE or female for DCE. To order a cable, see the "Obtaining Technical Assistance" section on page xviii.

Figure A-19 EIA/TIA-530 Serial Transition Cable Connectors

Was this Document Helpful?

FeedbackFeedback

Contact Cisco

This Document Applies to These Products