Datatek DT-4180 - Manual (Page 55)

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The prot=<protocol> option defines the protocol used by the port. It may take on the
values of Raw, Async, HDLC, SDLC, EBSC (EBCDIC BiSync), ABSC (Ascii BiSync),
UNI (Uniscope BiSync), ALC (ALC BiSync), DDCMP, VIP (VIP 7600 BiSync), REDAC
(SCADA Telemetry), E2A (E-Telemetry), or DPS (DPS Specific E-Telemetry). The
former name of the E2A protocol (VBA) is no longer supported to avoid any confusion.
The DPS protocol is supported on the 9480, and the 4284. The default protocol is
Async. The Raw protocol is asynchronous, without the benefit of Telnet RFC
encapsulation. It is used for direct TCP connections to the user ports. Please send email
to the author at
[email protected] or via telephone @ (386) 754-5700, with any other
protocol requests.
Ports with a type of
IPDSU may also have a protocol type of SWT, SAMWT, or DDS
relating to specific BNS trunk modules.
The dxe=< DCE | DTE > option specifies the clocking and signaling mode of the port.
The default value is DCE.
When the protocol is asynchronous, a dxe value of DCE implies that the port is
operating as a modem device. It will assert CTS when presented with RTS. A value of
DTE for the asynchronous protocol implies that the port is operating as a 2-wire DTE.
When there is data available to send, it will assert RTS and wait for CTS before sending
data. Please note that a four wire DTE interface should be configured as DCE even
though is uses a DTE asynchronous connector.
When the protocol is synchronous (e.g. SDLC), a dxe value of DCE implies that the
xxxx should generate the clock signals. This would require the standard synchronous
DCE cable adapter. A dxe value of DTE implies that the xxxx should accept the clock
signals presented on the port. This would require the standard synchronous DTE cable
adapter. When the protocol uses a recovered clock instead of a separate clock lead (e.g.
SDLC NRZI two wire), the dxe value operates like the asynchronous protocol described
above since external clocking is not necessary. The appropriate asynchronous adapters
should be used.
The clk=< NORM | RCVD > option specifies the location of the clock signal. A value of
NORM indicates that the clock signals are present on the TxC and RxC leads. This is
the normal operating mode for synchronous protocols. A value of RCVD indicates that
the clock signals are presently encoded in the data stream. This is valid for NRZI and
FM encoding of the data stream for any protocol.
The phy=<232 | V35 | 530> option specifies the physical interface specification to be
used by a 9116 connected to the user port. If a 9116 is not connected, the physical
interface is RS-232. The 4280 automatically determines a 9116 connection and performs
the dynamic configuration.
The enc=<NRZ|NRZI> option specifies the physical encoding of the line. The default is
Non-Return to Zero (NRZ).