Special key operation for TELNET

Table 1 contains information about the operation of special keys for the TELNET function when you are using a terminal that is not part of the 3270 family.

Use these key combinations if you are using TELNET and your terminal does not have the key that you want to use. For example, if you want to clear your screen and your terminal does not have an ERASE INPUT key, press CTRL+Y to get the same result.

To use the TELNET extensions, TCP⁄IP must be configured using the DBCSTRANSFORM option. For more information, see the z/OS Communications Server: IP Configuration Reference.

Table 1. Special key conversions
Function name	Input keys	Function description
Duplicate	Ctrl+D	Press CTRL and D together. This combination enters the Duplicate control code in the screen buffer and a TAB is performed on the screen.
Field Mark	Ctrl+K	Press CTRL and K together. This combination enters the Field Mark control code in the screen buffer and displays it as a blank on the screen.
Redisplay	Ctrl+V	Press CTRL and V together. This combination redisplays the contents of the screen buffer on your screen.
Erase Input	Ctrl+Y	Press CTRL and Y together. This combination erases all characters in the unprotected fields on the screen and replaces them with blanks. The cursor is placed at the first unprotected character position on the screen.
Erase EOF	Ctrl+X	Press CTRL and X together. This combination erases all characters in an unprotected field from the cursor position to the end of the field and replaces them with blanks. If the cursor is on a protected field, the screen is inhibited and no characters are erased.
Delete One Character	Del	The DEL deletes the character at the cursor position, if the field is unprotected. The cursor does not move. All characters in the unprotected field to the right of the cursor are shifted one position to the left and blank characters are added at the end of the field.
Alphanumeric or Alphanumeric-Kana	Ctrl+B	Press CTRL and B together. This combination is a toggle switch that redisplays the screen by switching between Alphanumeric and Alphanumeric-Kana mode.
Field Forward Tab	Ctrl+F	Press CTRL and F together. This combination moves the cursor to the first character position in the next unprotected field. If the screen is unformatted or there are no unprotected fields on the screen, the cursor is placed in the first position on the screen.
Field Backward Tab	Ctrl+A F, or Ctrl+A Ctrl+F	Press CTRL and A together then press F, or Press CTRL and A together then press CTRL and F together. This combination moves the cursor to the first character position in the previous unprotected field. If the screen is unformatted or there are no unprotected fields on the screen, the cursor is placed in the first position on the screen.
Home	CSI P, or ESC [ P	Press CSI then press P, or Press ESC then press [ then press P. This combination moves the cursor to the first character position in the first unprotected field on the screen. If the screen is unformatted or there are no unprotected fields on the screen, the cursor is placed in the first character position on the screen.
Move Cursor Up	CSI A, or ESC [ A	Press CSI then press A, or press ESC then press [ then press A. This combination moves the cursor up one line in the same column. If the cursor is on the first line on the screen, it moves to the last line on the screen.
Move Cursor Down	CSI B, or ESC [ B	Press CSI then press B, or press ESC then press [ then press B. This combination moves the cursor down one line in the same column. If the cursor is on the last line on the screen, it moves to the first line on the screen.
Move Cursor Right	CSI C, or ESC [ C	Press CSI then press C, or press ESC then press [ then press C. This combination moves the cursor one character to the right. If the cursor is in the last column in a line, it moves to the first position in the next line on the screen. If the cursor is in the last position on the screen, it moves to the first position on the screen.
Move Cursor Left	CSI D, or ESC [ D	Press CSI then press D, or press ESC then press [ then press D. This combination moves the cursor one character to the left. If the cursor is in the first column in a line, it moves to the last position in the previous line on the screen. If the cursor is in the first position on the screen, it moves to the last position on the screen.
Backspace One Character	Ctrl+H	Press CTRL and H together. This combination deletes one character before the cursor position in an unprotected field. The cursor moves one position to the left and all characters in the field shift one position to the left. If the cursor is on a protected field the screen is inhibited.
Reset	Ctrl+R	Press CTRL and R together. This combination releases the screen inhibit condition. When the screen is inhibited, only the RESET and MASTER RESET key combinations remain active.
Master Reset	Ctrl+A M, or Ctrl+A Ctrl+M	Press CTRL and A together then press M, or Press CTRL and A together then press CTRL and M together. This combination produces the same results that you get if you key in REDISPLAY followed by RESET.
Clear	Ctrl+L	Press CTRL and L together. This combination fills the screen with blanks and places the cursor at the first character position on the screen. MASTER RESET key combinations remain active.
Enter	Ctrl+M	Press CTRL and M together. This combination sends the data on the screen to the host system.
CSI stands for Control Sequence Indicator.