Using TSO via ARPA Network Virtual Terminal (RFC0377)
Original Publication Date: 1972-Aug-10
Included in the Prior Art Database: 2000-Sep-13
Internet Society Requests For Comment (RFCs)
AbstractA. Connecting to TSO -----------------
NETWORK WORKING GROUP R.T. BRADEN
REQUEST FOR COMMENTS #377 UCLA/CCN
NIC 11119 AUGUST 10, 1972
USING TSO VIA ARPA NETWORK VIRTUAL TERMINAL
A. Connecting to TSO
IBM's Time Sharing Option (TSO) is available at UCLA-CCN on Socket 1
using the standard Telnet protocol.
1. To access TSO, the remote user performs ICP to Socket 1 at CCN
and executes the command:
TSO CR LF
2. Possible responses to the TSO command are:
a. "WELCOME TO UCLA/CCN TSO"
followed by a herald ("!"). TSO is available. A TSO LOGON
command should be entered following the herald.
b. "TSO NOT AVAILABLE AT THIS TIME"
The user should check the TSO schedule and verify that it
should be available. If so, he can call the CCN on-line help
phone, 213-825-1652 for availability information, or send a
message to the operator through NETRJS.
c. "ALL TSO PORTS BUSY"
The user should try again after a short time. If this
condition recurs frequently, notify the Technical Liaison at
CCN so that more Network ports can be added.
3. When first connected to CCN server Telnet, the user has a choice
of several commands besides "TSO". The TSO-related commands are:
HELP - A listing of commands at this level, and other
BBOARD - List operational notices.
4. Local echoing (i.e., by the user site) is required.
5. Server-Telnet will time-out and disconnect the user if:
a. Output to the Network does not complete within 5 minutes, or
b. An INS, DATA MARK pair does not match within 2 minutes, or
c. TSO waits for the user to enter input for 20 minutes.
B. Conversing with TSO
1. TSO is strictly a line-at-a-time system. Input is not scanned
until either an end-of-line or an INS (interrupt) is received at
CCN. TSO sends the user an exclamation mark ("!") as a herald
when waiting for input.
2. The end-of-line indication for input and output lines is the
standard CR LF sequence.
3. The remote user my interrupt TSO output by sending an INS and
DATA MARK (Telnet X'80'). Note to TIP users: this may be
accomplished with the TIP command "SEND SYNC". Each such
interrupt is passed to TSO, which interprets it as an output
break, i.e., as if the user pressed the ATTention key on his
2741 while the keyboard was _locked_.
On the Network, "attentions" are not used to delete lines being
entered. The CCN Server-Telnet provides line editing functions
for TSO users: the ASCII control CAN deletes the line being
entered, while ...