Table C-l lists error messages you may receive on your terminal screen.
Table C-1. Error Messages
Message Explanation command. Try the command again.
Contact your site administrator if you are still unsuccessful.
TELNET: COMMAND INVALID A response to a command that you typed wrong or misspeiied. Try the command again.
TELNET: COMMAND INVALID, NO A response indicating that you issued a CONNECTION ESTABLISHED command that is valid only when you
have a connection. Type in a
%%CONNECT command to establish a connection.
TELNET: COMMAND MISSING A response indicating that the command PARAMETER NO. nnn you typed is missing a parameter. nnn
defines the position in the parameter list, 001 equals the first parameter, 002 equals the second parameter, and so on. Retype the command.
TELNET: CONNECTION ALREADY Indicates you issued a %%CONNECT
OPEN command when a connection was
already open. Use the open connection.
continued
7831 5553-001 C--1
or Messages
Table C-1. Error Messages (cant.)
Message Explanation
TELNET: DUPLICATE CONNECTION An internal system error. Contact your
ATIEMPT site administrator.
TELNET: ERROR IN PROCESSING Means you used an invalid format for the
HOST NAME remote host address in a %%CONNECT
command.
TELNET: INVALID ATTACH ATIEMPT Indicates that the ATIACH command you typed was in an invalid format, or the remote host received other data when it expected ATIACH information.
TELNET: INVALID HOST NAME indicates that the host name directory ENTERED cannot find the host name you specified
on a %%CONNECT command. Contact your site administrator.
TELNET: INVALID PARAMETER FOR Indicates that a command parameter NO. nnn value is invalid. nnn defines the position
in the parameter list; 001 equals the first parameter; 002 equals the second parameter, and so on.
TELNET: INVALID PORT ENTERED Indicates you specified a wrong port number. You must specify port 256, 257, or 258 for a pass-through connection.
These port numbers are not valid for a gateway connection.
TELNET: INVALID SENTINEL Means that the parameter for the
%%CHANGE command is invalid. Make sure that the TELNET sentinel is not the same as the Telcon sentinel.
TELNET: INVALID TERMINAL ID Means that the terminal type you entered in an ATIACH command is invalid.
Check the ATIACH command list of valid terminal types.
TELNET: IP OPTION ERROR Means a protocol option error exists.
Contact your site administrator.
TELNET: NETWORK FAILURE Means the network has failed or gone down. Wait a few minutes and retry the connection.
continued 7831 5553-001
Error Messages
Table C-1. Error Messages (cant.)
Message Explanation
TELNET: NETWORK NOT FOUND Means the address in the %%CONNECT command is invalid. Check the address and try the connection again.
TELNET: NO ADDRESS EXISTS FOR Means the directory could not find an THIS NAME entry Tor this name in a %%CONNECT
command. Check the spelling of the name or contact your site administrator.
TELNET: NO CONNECTION EXISTS Indicates an internal system error. Tell your site administrator that the configuration may need to be verified.
TELNET: NO FOREIGN SOCKET Indicates an internal system error.
SPECIFIED Contact your site administrator.
TELNET: NO LINK TABLE FOUND IN IP Indicates an internal system error.
Contact your site administrator.
TELNET: NO RESOURCES FOR Means that the local application is REQUEST overloaded. Wait a few minutes and try
the connection again. If you are still unsuccessful, contact your site administrator.
TELNET:NO ROUTE TO DESTINATION No routes to the iemote [lost are
IS AVAILABLE available.
TELNET: NO SOURCE ADDRESS The DCP to which the terminal is CONFIGURED attached does not have a destination's
IP address configured.
TELNET: OPEN FAILURE Means that the connection failed at the remote host for an unknown reason.
Wait a few minutes and try the connection again. If you are still uhsuccessful, contact your site administrator.
TELNET: REMOTELY REQUESTED Means that the remote host requested a
ABORT connection abort. Contact your site
administrator.
TELNET: SECURITY/PRECEDENCE Indicates that your security levels do not VIOLATION match those used by the remote host.
Contact your site administrator.
continued
7831 5553-001
C-3
or Messages
Table C"1. Error Messages (cant.)
Message Explanation
TELNET: SERVICE FAILURE Indicates that the network has detected a termination of the connection. Contact your site administrator.
TELNET: STRICT SOURCE ERROR Means a requested message failed to be routed. Contact your site administrator.
TELNET: SYNTAX ERROR IN Indicates a command syntax error.
COMMAND Carefully retype the command.
TELNET: TIMEOUT OCCURRED Indicates that a time-out condition . occurred when you attempted a
connection, or the connection timed out while you were sending data.
TELNET: ULP - REQUESTED ABORT Indicates that the remote host or DCP generated an abort request on your TELNET connection. Contact your site administrator.
TELNET: ULP - REQUESTED CLOSE Means the remote host or local application requested a close of your TELNET connection. Contact your site administrator.
TELNET: UNSPECIFIED ERROR Indicates an unknown cause for an internal system error. Contact your site administrator.
TELNET: UNSUPPORTED COMMAND Means the· remote OS 1100 received a RECEIVED FROM CMS request from CMS 1100 that it does not
support. CMS 1100 (on a remote OS 1100 host) assumes OS 1100 DCA protocols. Some terminal operations assumed in DCA protocols cannot be translated. This message may indicate
..
. , .. ' . . 'an appliCatiOn limitation.
continued
7831 5553-001
Error Messages
Table C-1. Error Messages (cont.)
Message Explanation
TELNET: WAIT -- LAST INPUT IGNORED Means that TELNET is attempting to establish a connection to a remote host.
No commands or other data can be entered until the connection attempt is complete.
The attempt either succeeds or fails;
other messages indicate the result of the connection attempt. Refer to the information messages in Appendix B for possible responses.
7831 5553-001 C-5
Glossary
o
DCA
See Distributed Communications Architecture.
DCP
See Distributed Coinmunications Processor.
DDN
See Defense Data Network.
Defense Data Network (DDN)
A packet-switching network used and operated by the United States Department of Defense.
Distributed Communications Architecture (DCA)
A Unisys proprietary architecture and communications protocol family based on the Open Systems Interconnection Reference Model.
Distributed Communications Processor (DCP)
E
A member of the Unisys DCP family, which is a series of front-end processors and remote concentrators that provide communications facilities for Unisys host computers.
external end user (XEU)
A network definition statement that defines an external end user program, such as TIP, demand, or batch.
internet
A series of interconnected networks.
7831 5553-001 Glossary-1
Dssary
See local area network.
:al area network (LAN)
A data communications network that is confined within a specific area and whose resources are shared.
Idule
In this manual, a one- or two-page presentation of coherent material.
)S
See network definition statement.
lwork definition statement (NDS)
A formatted configuration statement that names and defines a network entity for Communication Management System (eMS) 1100, Telcon or associated program products.
cket-switched network
A network on which data is transmitted in units called packets. Packets can be routed individually over the best available network connections and reassembled to form a complete message at their destination.
See public data network.
)tocol
The -rules that computers, terminals and other devices follow when they communicate.
blic data network
A network that provides data communications services to the public.
)ssary-2 7831 5553--001
Glossary
s
sentinel characters
A two-character sequence that tells the DCP that what follows is a command, not data. Both TELNET and Telcon require a sentinel character, but they can never be the same sequence.
Server TELNET
T
A TELNET component. It runs in a computer remote from the user terminal that initiates a connection, often on the computer the user wants to access.
Server TELNET receives keystrokes from terminals across a network through a User TELNET implementation. Server TELNET passes the user keystrokes to an application and passes application output to User TELNET, which in turn passes the output to the terminal.
TCP/IP network
A network using the TCPJIP protocols. The Defense Data Network and many local area netvlorks and Pllblic data net'llorks are examples.
TCP/IP protocols
See transmission control protocol/internet protocol.
TCP-IP Stack program product
A Unisys program product that runs on a DCP and implements the TCPJIP protocols.
TELNET protocol
A member of the TCP/IP family of protocols that defines how terminals should communicate with applications and other terminals.
transmission control protocol/internet protocol (TCP/IP)
A widely accepted family of communications protocols that enables dissimilar computers and other devices to communicate. A significant feature of the TCPJIP protocols is their ability to enable communications across multiple interconnected networks.
7831 5553-001 Glossary-3
)ssary
erTELNET
u
A TEL NET component. It runs on the computer to which the initiating terminal is attached. User TELNET accepts keystrokes from the terminal and passes them across the network to Server TELNET, which in turn passes them to an application. User TELNET also receives application output through Server TELNET. It passes this output on to the terminal.
See external end user.
3sary-4 7831 5553-001
Bibliography
DCP Series TCP-IP Stack Configuration and Operations Guide (7831 5512).
Unisys Corporation.
DCP Se11es TCP-IP Stack Programming Reference Manual (7831 5561). Unisys Corporation.
7831 5553-001 Bibliography-1
ndex
DISCONNECT, 2-20, 2-22, A-7 INTERRUPT, 2-14, A-8CONNECT command, 2-8,2-9, A-6
D
DISCONNECT command, 2-20, 2-22, A-7
E
error messages, C-l, C-2, C-3, C-4, C-5
information messages, B-1, B-2 internet network, 1-2
INTERRUPT command, 2-14, A-8
M
messages
o
error, C-l, C-2, C-3, C-4, C-5 information, B-1, B-2
OPEN command, 2-6,2-7
sentinel character sequence, 2-17, A-5
7831 5553-001 Index-1
· TELNET, 3-1 :ommand, 2-15, A-II
command, 2-26, 2-27
~ommand, 2-4,2-5
-2
T
TCP lIP protocols, 1-2 TELNET application, 1-2 terminal types, 3-3
7831 5553-001