Loopback cable. RJ45 to DB25 Serial Printer cable using hardware flow control. DCD=up DSR=up DTR=up RTS=up CTS=up. Router#sh controller. Interface Serial0/0. Hardware is PowerQUICC MPC860. DCE V.24 (RS-232), clock rate 19200. Idb at 0x824450CC, driver data structure at 0x8244C7F0. SCC Registers: Without DTR Pin (20) connected: Router#sh int ser 0/0. Serial0/0 is down, line protocol is down. Hardware is PowerQUICC Serial.
Contents
Introduction
This document contains configuration information on connecting KG-84A cables to Sun serial ports and Cisco gateways using Codex LSI 24/24 and Avanti 2200 Series synchronous modems.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
The information in this document is based on the software and hardware versions below:
- KG-84A cables
- Avanti 2200 Series synchronous modems
Conventions
For more information on document conventions, see the Cisco Technical Tips Conventions.
Cables
This section describes the cables necessary to connect the KG-84A to the Cisco or the Sun serial ports using the Codex modem. The Cisco port is running a synchronous connection, and the Sun port is asynchronous.
Red Cable
RS 232 Side | KG Side (Red J3 Connector) Female | ||
---|---|---|---|
Pin | Name | Pin # | |
1 | Frame Ground | 2 | |
2 | TD | ---> | 17 |
3 | RD | <--- | 6 |
4 | RTS | ---> | 11 |
5 | CTS | <--- | 19 |
6 | DSR | <--- | 51 |
7 | Signal Ground | 1 + 9 + 18 + 46 | |
8 | DCD | <--- | 40 |
20 | DTR | ---> | 38 |
The following two are needed for the synchronous cable (KG to Cisco): | |||
15 | Tx Clk | 15 | |
17 | Rx Clk | 20 |
Notes:
- The KG-84A uses differential inputs for many of the signals. It is imperative that pins 9, 18, and 46 be tied to pin 1 on the KG connector (as shown above). Pins 9, 18, and 46 are the (unused) other side of certain signals. Also, do not connect pins 7, 22, 41, or 53 on the KG side. These are differential amplifier outputs and should be left open-circuited.
- Do not cable the 15-15 and 17-20 connections for the asynchronous link between the KG and the Sun serial ports.
Black Cable
RS 232 Side | KG Side (Black J2 Connector) Female | ||
---|---|---|---|
Pin | Name | Pin # | |
1 | Frame Ground | 2 | |
2 | TD | <--- | 15 |
3 | RD | ---> | 13 |
4 | RTS | <--- | 29 |
5 | CTS | ---> | 27 |
6 | DSR | ---> | 51 |
7 | Signal Ground | 1+12+28+35+53+22+20+30+18 | |
8 | DCD | ---> | 34 |
20 | DTR | <--- | 17 |
Clocks for synchronous operation: | |||
15 | Tx Clk | ---> | 21 |
17 | Rx Clk | ---> | 19 |
24 | Ext TC | <--- | 32 |
KG84A/Avanti Working Configuration
This section has a summary of a working cable/configuration for connecting a KG-84A and an Avanti modem to form a synchronous link. The configurations and cables have been demonstrated to work when connecting two Sun serial ports according to the diagram below. The link information below is for a synchronous circuit.
Sun <> KG-84A <> Avanti Modem <> Avanti Modem <> KG-84A <> Sun
RS-232C | Red Side, KG-84A | |
---|---|---|
1 | 2 | |
Tx | 2 | 17 |
Rx | 3 | 6 |
RTS | 4 | 11 |
CTS | 5 | 19 |
DSR | 6 | 51 |
Gnd | 7 | 1-9-18-46 |
DCD | 8 | 40 |
TxC | 15 | 15 |
RxC | 17 | 20 |
DTR | 20 | 38 |
RS-232C | Red Side, KG-84A | |
---|---|---|
1 | 2 | |
Tx | 2 | 15 |
Rx | 3 | 13 |
RTS | 4 | 29 |
CTS | 5 | 27 |
DSR | 6 | 51 |
Gnd | 7 | 1-12-20 |
DCD | 8 | 34 |
RxC | 17 | 19 |
DTR | 20 | 17 |
24 | 32 |
The front panel settings on the KG-84A are as follows (to decode switch settings, refer to KG84A documentation or the inside front panel on the unit):
Parameter | Setting |
---|---|
Clock | 1 - on one side 2 - on other side |
Data Mode | 2 |
Data Rate, Rx | B4 (change to appropriate value) |
Data Rate, Rx | B4 (change to appropriate value) |
Step Pulse Intvl | 1, +0 |
Intfc (Interface) | 1 |
Sync. Mode | 5 |
Tty Mode | 1 |
Data Length | Sync (change to appropriate value) |
Comm Mode | 1 |
The Avanti modems have a series of dip switches inside the cabinet. Refer to the modem documentation for details of each option. Some of these options are essential for proper operation of the synchronous link; others may be varied to suit the individual need. These switches are configured as follows:
Switch | Setting |
---|---|
S5 | HD On (not RTS setting) |
S6 | CC Int TC |
S7 | 2 (match speed to KG and Sun settings) |
S8 | Power Level = -30 kb (switch 6, may be set differently) CTS Delay = 0 (switch 4) |
S9 | Med. Range (These settings may be different for other applications) Low 4W |
Equalizer jumper: In |
Related Information
Contents
Introduction
This document provides the technical specifications for the EIA/TIA-232 serial cables.
Prerequisites
Requirements
There are no specific requirements for this document.
Components Used
This document is not restricted to specific software and hardware versions.
The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared (default) configuration. If your network is live, make sure that you understand the potential impact of any command.
Conventions
For more information on document conventions, see the Cisco Technical Tips Conventions.
EIA/TIA-232 Speed and Distance Limitations
As with all signaling systems, EIA/TIA-232 signals can travel a limited distance at any given bit rate; generally, the slower the data rate, the greater the distance.
The table below gives the EIA/TIA-232 speed and distance limitations.
Data Rate (Baud) | Distance (Feet) | Distance (Meters) |
---|---|---|
2400 | 200 | 60 |
4800 | 100 | 30 |
9600 | 50 | 15 |
19200 | 50 | 15 |
38400 | 50 | 15 |
57600 | 25 | 7.6 |
115200 | 12 | 3.7 |
Serial Cable CAB-232MT
This section presents the cable assembly and pinouts for the CAB-232MT serial cable.
Note: The cable itself identifies the Cisco router as a data terminal equipment (DTE) or data communications equipment (DCE) device to other devices in the network; for this reason, it is important to select the correct product number from the table below.
The cable gender for this product (part number 72-0793-01) is Male - Male, mode - DTE.
The CAB-232MT cable is used in the Cisco 7000 family, Cisco 4000 series, Cisco 3600 series, Cisco 2500 series, Cisco 1600 series, Cisco access servers, and AccessPro PC cards. This cable has a male DB-60 connector on the Cisco end and a male DB-25 connector on the network end.
EIA/TIA-232 Serial Cable Assembly
EIA/TIA-232 DTE Cable Pinouts
The table below shows the EIA/TIA-232 DTE cable pinouts (DB-60 to DB-25).
Note: The arrows indicate signal direction:
- ---> indicates DTE to DCE
- <--- indicates DCE to DTE
60 Pin1 | Signal | Description | Direction | 25 Pin | Signal |
---|---|---|---|---|---|
J1-50 J1-51 J1-52 | MODE_0 GND MODE_DCE | Shorting group | - | - | - |
J1-46 | Shield GND | Single | - | J2-1 | Shield GND |
J1-41 Shield | TxD/RxD - | Twisted pair no. 5 | ---> - | J2-2 Shield | TxD - |
J1-36 Shield | RxD/TxD - | Twisted pair no. 9 | <--- - | J2-3 Shield | RxD - |
J1-42 Shield | RTS/CTS - | Twisted pair no. 4 | ---> - | J2-4 Shield | RTS - |
J1-35 Shield | CTS/RTS - | Twisted pair no. 10 | <--- - | J2-5 Shield | CTS - |
J1-34 Shield | DSR/DTR - | Twisted pair no. 11 | <--- - | J2-6 Shield | DSR - |
J1-45 Shield | Circuit GND - | Twisted pair no. 1 | - - | J2-7 Shield | Circuit GND - |
J1-33 Shield | DCD/LL - | Twisted pair no. 12 | <--- - | J2-8 Shield | DCD - |
J1-37 Shield | TxC/NIL - | Twisted pair no. 8 | <--- - | J2-15 Shield | TxC - |
J1-38 Shield | RxC/TxCE - | Twisted pair no. 7 | <--- - | J2-17 Shield | RxC - |
J1-44 Shield | LL/DCD - | Twisted pair no. 2 | ---> - | J2-18 Shield | LTST - |
J1-43 Shield | DTR/DSR - | Twisted pair no. 3 | ---> - | J2-20 Shield | DTR - |
J1-39 Shield | TxCE/TxC - | Twisted pair no. 6 | ---> - | J2-24 Shield | TxCE - |
1Any pin not referenced is not connected.
Serial Cable CAB-232FC
This section presents the cable assembly and pinouts for the CAB-232FC serial cable.
The cable gender for this product (part number 72-0794-01) is Male DB-60 to Female DB-25, mode - DCE.
This cable is used in the following systems: the Cisco 7000 family, Cisco 4000 series, Cisco 3600 series, Cisco 2500 series, Cisco 1600 series, Cisco access servers, and AccessPro PC cards. This cable has a male DB-60 connector on the Cisco end and a female DB-25 connector on the network end.
EIA/TIA-232 DCE Cable Pinouts (DB-60 to DB-25)
The table below shows the EIA/TIA-232 DCE cable pinouts (DB-60 to DB-25).
Note: The arrows indicate signal direction:
- ---> indicates DTE to DCE
- <--- indicates DCE to DTE
60 Pin | Signal | Description | Direction | 25 Pin | Signal |
---|---|---|---|---|---|
J1-50 J1-51 | MODE_0 GND | Shorting group | - | - | - |
J1-46 | Shield GND | Single | - | J2-1 | Shield GND |
J1-36 Shield | RxD/TxD - | Twisted pair no. 9 | <--- - | J2-2 Shield | TxD - |
J1-41 Shield | TxD/RxD - | Twisted pair no. 5 | ---> - | J2-3 Shield | RxD - |
J1-35 Shield | CTS/RTS - | Twisted pair no. 10 | <--- - | J2-4 Shield | RTS - |
J1-42 Shield | RTS/CTS - | Twisted pair no. 4 | ---> - | J2-5 Shield | CTS - |
J1-43 Shield | DTR/DSR - | Twisted pair no. 3 | ---> - | J2-6 Shield | DSR - |
J1-45 Shield | Circuit GND - | Twisted pair no. 1 | - - | J2-7 Shield | Circuit GND |
J1-44 Shield | LL/DCD - | Twisted pair no. 2 | ---> - | J2-8 Shield | DCD - |
J1-39 Shield | TxCE/TxC - | Twisted pair no. 7 | ---> - | J2-15 Shield | TxC - |
J1-40 Shield | NIL/RxC - | Twisted pair no. 6 | ---> - | J2-17 Shield | RxC - |
J1-33 Shield | DCD/LL - | Twisted pair no. 12 | <--- - | J2-18 Shield | LTST - |
J1-34 Shield | DSR/DTR - | Twisted pair no. 11 | <--- - | J2-20 Shield | DTR - |
J1-38 Shield | RxC/TxCE - | Twisted pair no. 8 | <--- - | J2-24 Shield | TxCE - |