Port Configurable Parameter
AutoCTS - Locked Hardware Handshaking.
Easyadm provides the facility for the ports to always obey RTS/CTS transmit
and receive flow control, overriding system commands to turn hardware
flow control off. This feature is particularly useful for running
modems over UUCP. UUCP turns all flow control off, and uses its
own sliding window protocol. By default the AutoCTS flag is OFF.
A hardware handshake cable is required on a port if AutoCTS is turned
ON.
To change the AutoCTS flag setting from "Off' to "On' or vice versa:
Step 1.
Select a port and press <Enter>.
Step 2.
Highlight Options on the Port Configuration Menu and press <Enter>.
Step 3.
Highlight Port and press <Enter>.
Step 4.
Change the AutoCTS parameter and press <Enter> to execute.
Device Configurable
Parameters
Each Device on a port has a configurable Onboard Device Flag, whilst
any device on a port configured with multiple devices has the following
extended list of configurable parameters:
- Onboard
- Block
- Maximum CPS
- Quantum
- Escape Wait
- Flow Control Characters
Onboard Device Flag
The Onboard device flag applies to all devices configured on a port.
It should be turned off only when absolutely necessary. System
performance may be affected by turning the Onboard flag off. If the
Onboard device flag is turned on for a device, Stallion Technologies
enhanced character processing is enabled, significantly reducing the
load on the host CPU. If a program doesn't work on an EasyConnection
port, but does on a standard serial port, then turning the Onboard device
flag off may fix it.
To change the Onboard device flag setting from "Off' to "On' or vice
versa:
Step 1.
Select a port and press <Enter>.
Step 2.
Highlight Options on the Port Configuration Menu and press <Enter>.
Step 3.
Highlight Device and press <Enter>.
Step 4.
Select the Port Device and press <Enter>.
Step 5.
Change the Onboard device parameter and press <Enter> to
execute.
Block Device Flag
The Block Device Flag applies to Multiple Session Devices. This flag
should be turned "Off' only if your terminal supports multiple windows.
Multiple Sessions are handled differently by different terminals.
MSS supports a number of methods. Some terminals, such as the
Wyse 60, use a separate page for each terminal session. Others
support multiple tiled windows. All windows appear to be updated
simultaneously.
When the Block Device Flag is turned "On', the board software blocks
output to all except the current session. The Block Device Flag
defaults to "On' when a terminal session is enabled. If this flag
is turned "Off', output to sessions proceeds simultaneously.
To change the Device Flag from "Off' to "On' or vice versa:
Step 1.
Select a Port Device and press <Enter>.
Step 2.
Highlight Options on the Port Configuration Menu and press <Enter>.
Step 3.
Highlight Device and press <Enter>.
Step 4.
Select the port device type to be configured and press <Enter>.
The Device Flags display with their respective status highlighted.
Step 5.
Change the Block Device Flag and press <Enter> to execute.
Maximum CPS (CHARS/SEC) Device
Flag
If output to your terminal pauses intermittently when the attached
printer is printing, modifying the CPS may solve your problem.
As printers tend to be slower output devices than terminals, attached
printers will often signal the terminal to pause output. Most
terminals then relay this signal to the board sub-system. This
results in all transfers between the board and the terminal being temporarily
suspended (flow controlled). Output to the terminal's screen will
also stop.
To solve this problem, lower the maximum CPS value on the Attached
Printer Device. This places an upper limit on the number of characters
sent to the attached printer per second. Set this value slightly
less than the printer's minimum printing rate. This will prevent
the printer from requesting flow control.
The default CPS value for Attached Printers is 120 characters per second.
It is zero for other devices.
To modify the CPS value for an Attached Printer:
Step 1.
Highlight Select on the Main Menu, press <Enter>, highlight
the panel containing the relevant port and press <Enter>.
Step 2.
Highlight Select on the Configuration Menu, press <Enter> and
then the port supporting the Attached Printer and press <Enter>.
Step 3.
Highlight Options on the Port Configuration Menu & press <Enter>.
Step 4.
Highlight Device, press <Enter>, highlight Attached Printer
in the Device Table and press <Enter>.
Step 5.
Change the Maximum CPS parameter & press <Enter> to execute.
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