Axel AX3000 80, Руководство пользователя

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Appendix
204
AX3000 Models 80 and 85 - User's Manual
(to avoid phantom sessions or to identify connections). This is the fixed port assignment. With this
method the AX3000 resources are always:
- session 1 = 1024, ..., session 8 = 1031,
- aux1 port = 1032, aux2 port = 1033, parallel port 1034.
- net1 = 1035, ..., net4 = 1038,
- usb1 = 1039, ..., usb4 = 1042.
f) 'Nagle's Algorithm' Parameter
The Nagle's Algorithm controls behavior of the output network dataflow of a TCP/IP device. This
algorithm allows the number of datagrams sent by the AX3000 to decrease. However a certain
latency may be noticeable due to the caching of data before transmission.
This algorithm is disabled to prioritize performance. However some operating systems require this
function to be enabled.
g) 'Keepalive' Parameter
The keepalive is a mechanism that allows the AX3000 to regularly check its TCP/IP connection
status.
In event of network incident, the AX3000 is able to detect this incident and to close the related
TCP/IP connections. This mechanism is also useful when DSL connections are used (the AX3000
IP address is reset on time per day).
By default the keepalive function is disabled.
The keepalive function is set in minutes
Note : with ISDN routers (which automatically drop the phone line) this regular data flow will prevent
the router from hanging-up. In this scenario the keepalive can cause expensive phone bills.
h) 'Additional Time-Out for Reconnection (sec)' Parameter
When a session is set in 'auto-reconnection' mode, the reconnection is attempted immediately after
the disconnection.
If needed, this option allows this reconnection to be delayed.
i) 'Break Code' Parameter
For the telnet session, the <Ctrl><Alt><Pause> hotkey sends a 'break' code to the host. This
break code is defined by the RFC 854, this is 'IAC BREAK'.
If needed, this break code value can be modified. The extra values are:
- AO (Abort Output),
- IP (Interrupt process),
- None (<Ctrl><Alt><Pause> generates no code).
j) 'Enabling NAWS' Parameter
The NAWS function (Negotiate About Window Size - RFC 1073) is an optional feature negotiated
when the telnet session established. It allows the thin client screen format (line x row) to be
indicated to the server (when the session is established or at any time when the screen format is
modified).
This parameter allows this function to be disabled: some telnet servers don't correctly support the
NAWS function.