Black Box 5000 manual Table F-1. Spool Mode, Type of Terminal

Multiserver 5000

Table F-1. Spool Mode

User Terminal Configuration			Multiserver 5000 Configuration
			Flow	Buffer
Type of Terminal	Term Type	HP Channel	Control	Control
HP26XX CRTs	10	Enabled	X-ON/X-OFF	X-ON/X-OFF
Non-HP 4 (TTY)	Disabled	X-ON/X-OFF	X-ON/X-OFF	n/a
HP2631 and HP2635 Printers	19	Disabled	None	None

•HP port should be enabled when Term Type 10 is configured by the CPU or the terminal user.

•Do not define the DC2 character for either

X-ON or X-OFF when using X-ON/X-OFF flow control for Hewlett-Packard systems.

•For ENQ/ACK protocol to function properly, one port must be set as host and the other port as terminal.

•An HP port configured as Host cannot enter the Command Mode.

SPOOL MODE (TERM TYPE 19)

The spool mode uses X-ON/X-OFF characters from the printer to indicate status conditions to the HP3000 system. To avoid a system timeout, disable the HP Channel Feature for ports that use the spool mode. Set buffer and flow control to none (using the Channel Characteristics Menu) when HP2631 and HP2635 printers in an HP system are to operate in the spool mode.

Ports with flow control = none will not respond to X- ON/X-OFF from the terminal or the computer.

Table F-1summarizes HP and non-HP channel configurations.

Tail-Ending Mode (Dial-Up Modem Operation)

The tail-ending mode operates only for dial-up modems connected to terminal ports. This mode guarantees that a Multiserver unit, upon recogni- tion of a disconnect request from a dial-up modem, will deliver that disconnect indication to its associated Multiserver port (the far-end terminal or host), even if the composite line is temporarily out of service.

For dial-in modems, set the configuration as follows:

• EIA Control	Enable
• Sync Loss Disconnect	Enable

A high transition of RI on a port with enabled EIA controls, flags the port as a dial-up modem link.

If DSR is dropped by the modem at a dial-up modem terminal interface, the Multiserver unit will drop all control signals to the modem (DTR, Busy, RTS, and Unassigned). DSR is passed through the link, either immediately or after composite reacquisition. DSR is then held low for one second. The outbound signals in the direction of the modem (DTR, Busy, and RTS) are made transparent.

At the host interface, the tail-ending mode operates with the DTR control signal. When the host drops DTR, the Multiserver unit will drop RI, DSR, CD, and CTS to the host. DTR is passed to the modem (immediately or after composite sync reacquisition) and is held for one second, after which the previously held controls to the host are allowed to be passed transparently.

Inbound data, which has been buffered in the local Multiserver unit, will be passed through to the remote terminal or host before interface signal DSR goes low. Outbound data, buffered for the port that performed the disconnect, is discarded.

NOTES:

•Performing a reset on a tail-ending port terminates the Command Facility on that port.

•Tail-ending ports may not perform composite loopback tests.

•The remote unit will not display the current configuration for a dial-in port if the values for this port have been changed using the Local Channel Configuration Menu.

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