MLTNET: A "Multi Telnet" Subsystem for Tenex (RFC0339)
Original Publication Date: 1972-May-01
Included in the Prior Art Database: 2019-Feb-12
Internet Society Requests For Comment (RFCs)
NETWORK WORKING GROUP R.Thomas REQUEST FOR COMMENTS #339 BBN N.I.C. #9932 May 5,1972
MLTNET - A "MULTI-TELNET" SUBSYSTEM FOR TENEX
MLTNET is a TELNET-like facility for TENEX which enables a user to control a number of jobs, running on different ARPANET hosts. It multiplexes the user’s local console among the remote jobs. MLTNET is useful in applications which require coordinated behavior of several network hosts. In particular, we have found it helpful in debugging programs which make use of the network. The MLTNET program is designed to be easy to use and, while used in remote mode, to be as transparent as possible to the user. It is somewhat less sophisticated than the TENEX user-TELNET program. MLTNET is currently a subsystem on the BBN- TENEX host.
MLTNET operates in two modes:
1. Local Mode Operation: When in local mode MLTNET interprets input types by the user as commands to it. Commands consist of a mnemonic command name followed by zero or more parameters. Included in the commands recognized by MLTNET are ones which enable the user to associate a name of his choice with a connection to an ARPANET site, to establish a connection with a named site, to list the network status as seen from the user’s TENEX etc.
2. Remote Mode Operation When operating in remote mode MLTNET makes the user’s console appear to be directly connected to a remote site. It transmits input typed by the user to the remote site and prints output recieved from the remote site. Output received from a remote site while the user is in local mode or is interacting with another remote site is buffered for the user by MLTNET.
MLTNET has been designed to be transparent to the user while operating in remote mode. In particular, when in remote mode it transmits user-types ^C (CONTROL-C, the TENEX "attention" character) and ^T (CONTROL-T, the TENEX "time used query" character) to the remote site.
When in local mode ^C and ^T have their usual TENEX effect.
Occasinally a user may find it necessary to modify the characteristics of a connection to a particular remote site. For example, he may want to have MLTNET echo typed input as it is transmitted. Or, he may be using a remote host which requires both upper and lower case characters from a local terminal which has only upper case; in such a case he would want MLTNET to transmit upper and lower case as appropriate. In remote mode operation MLTNET recognizes "!" as an escape character and interprets the character following it as a command to change the characterristics of the connection currently in use. Commands recognized by MLTNET in remote mode are summerized in the next section. To have MLTNET transmit "!" to the remote site the user types "!!".
MLTNET Command Summary
Local Mode Commands
MLTNET uses the character "<" to signal the user that it is in local mode ready to accept input. Commands and command parameters may be editted as they are input.The character ^A (CONTROL-A) deletes the last...