Application and Connectivity Considerations

There are several considerations to keep in mind when using TELNET:

DIn certain cases, it may take longer to send terminal data from the physical terminal over the network to the remote node than the time allowed by an application program. If the program fails to receive the needed data, it will result in error. User written applications that are expected to run over TELNET should be written with this in mind.

DTELNET does not support HP 12040D MUX firmware with revision earlier than 5.02.

DMake sure your application runs locally without errors before executing it over a TELNETconnection.

DDifferent terminals and computers may have different configuration requirements.

DBlock mode applications have a limited number of supported configurations when using TELNET. Refer to •Block Mode Considerations."

Connection Considerations

There are several connectivity considerations:

DOnly one connection for each TELNET user can be open at a time. HP does not support multiple connections per each TELNET user.

DA chained session is one where you have TELNET open to one computer and then you use TELNET from that computer to access another (a third) computer. Select a unique escape character for each host you wish to communicate with in a chained session. Refer to the subsection, •Chained TELNET Sessions" later in this section.

DFor connections to any computer, always set the HP 1000 host terminal RECVPACE configuration (receive direction) to XON/XOFF.

DFor block mode applications, terminals directly connected to an HP 1000 require XON/XOFF in both the transmit and receive directions. If the terminal is not set to XON/XOFF in both directions, a slow TELNET session may be overrun by the terminal and data will be lost or the application may hang.

DFor block mode applications, terminals attached to the TS8 with LSM 2.1 (or greater) software require XON/XOFF in only the receive direction. If XON/XOFF is set for the transmit direction, block mode applications may hang.

DYou cannot initiate a remote session to a PC. Remote sessions between an HP 1000 and PC can only be initiated from the PC.

TELNET 11