Lexmark X864 SCS/TNe Emulation User's Guide - Page 169

Keep Alive Type IMPORTANT: If the host has difficulty detecting the selected signal type, try changing to another type. Check with your system administrator to determine the type of signal to select. This Connection# > Server# Info option specifies the type of keep alive signal sent to the host. This signal is sent by the SCS/TNe Emulation to keep the Telnet session active. The option is normally left at its default setting. The Keep Alive Time setting determines how often this signal is sent. Check the host parameters TIMMRKTIMO and INACTTIMO to help determine the Keep Alive Type signal to be used and the Keep Alive Time value to set. Option Value None * Telnet NOP Timing Mark Comments Do not send keep alive signals. When this setting is selected, the host should be configured to send a keep alive signal. The SCS/TNe Emulation can receive and respond to a Telnet NOP or a Timing Mark keep alive signal. Send a Telnet No Operation as the keep alive signal. Send a Telnet timing mark as the keep alive signal. Operations - TN5250E SETUP: CONNECTION # > SERVER # INFO > Keep Alive Type 171