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The devices can be connected through Serial/RS232 or Telnet. Use Serial/RS232, if you are connecting a device using a cable, which is at a proximate distance. The Telnet can be used to connect through network. Before connecting to device, set various connection parameters and login options.
Connection Parameters
The devices can be connected through network, i.e., Telnet or Serial port.
Serial/RS232
Port Name
The serial port is called as a COM1, COM2, etc. in DOS/Windows and dev/ttyS0, dev/ttyS1,etc. in UNIX machines. Select a suitable port or add a new port.
Stop Bits
Stop bits are added to the serial communication protocol to allow, the receivers to synchronize on the characters being sent. It can be set as 1 or 2.
Data Bits
The data bits transferred through a serial port may represent device commands, sensor readings, error messages, and others. The data can be transferred as either binary data or ASCII data. Most serial ports use between five and eight data bits. Binary data is typically transmitted as eight bits. Text-based data is transmitted as either seven bits or eight bits.
Parity
The parity can be set to none, even, odd, mark, or space. With odd parity, the parity bit is selected so that the number of 1-bits in a byte, including the parity bit, is odd. Even parity works in a similar manner with all legal bytes including the parity bit having an even number of 1-bits. For mark parity, the parity bit is always a one-bit. For space parity it's always a zero-bit.
Baud Rate
The "baud rate" is data transmission rate (bits/second). Usual transmission speed ranges from to 9600 and 19200 BPS that are used in most automation and console applications to 115200 BPS used by the fastest modems.
Flow Control Mode
It is the mechanism that regulates the flow of data between two devices. There are two types of flow control modes: software flow control (XON/XOFF) and hardware flow control (CTS/RTS).
Telnet
This parameter specifies to which device the session has to be established. Typically, you can set it to "device name". Change the host name accordingly, if you wish to connect with a different host.
Specify the value as 23 (the default Telnet port number). If your Telnet server is running on different port, use particular port number.
The prompt is the string issued by the device after a successful login for getting the commands. Typically, this is a ">" or "#". Check the prompt that is issued by your device. You can set the prompt as ">" assuming the command prompt is ">" in user mode. Change accordingly, if this differs on your system.
Login Options allows you to set Login Prompt, Password Prompt, Login Name, and Password.
This is the prompt issued by the device for getting the login name or user name. Please make sure whether login prompt is required or not. This can be checked by establishing a connection through Telnet to the device using the standard telnet command. If this option is not required leave this field blank.
This is the prompt issued by the device for getting the password. Please make sure whether password prompt is required or not. You can check whether this prompt is required or not by establishing connection through Telnet to the device using the standard telnet
This is the user name or login name that is present on the system. Check whether the user name you are setting exists on the remote system.
The password for the user name. Make sure that the password that is set is correct.
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Note: There are two different passwords for routers. One is user password and the other is enable password. You can configure the routers only in enable mode. The Login Options allows you to enter into the user mode only. If you want to log into enable mode, you have to enter the enable password while running the configuration tasks. |
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Note: To connect the devices:
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or the