Visara CNA-8000 Installation - Manual (Page 90)

Chapter 7. SDLC Gateway
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The resulting Configuring SDLC Line panel is displayed below.
Field Definitions
Configure SDLC Line: This dropdown control displays the current line that the
configuration is associated with, and allows you to display a different line configuration.
Network Protocol: Currently only PU2.0 and PU2.1 protocols are supported on the
CNA-8000 through the SDLC interface.
NRZI: Set to ‘Yes’, the NRZI option will be used. When set to ‘No’, NRZ will be used
instead. This parameter must be set correctly to establish communication with the remote
device. If you are replacing an NCP platform with the CNA-8000 the correct value for
this parameter should show up in the NCP gen and is also called ‘NRZI’ there.
RTS: When set to ‘Constant’ the Request to Send (RTS) signal will be kept high. This
option is the preferred option if you are using a 4-wire circuit, since the CNA-8000 will
not have to wait for Clear to Send (CTS) to be offered. If you are using a 2-wire circuit,
you must set this option to ‘Controlled’. When set to ‘Controlled’ the RTS signal will be
brought active only when the CNA-8000 needs to transmit data. If you are having
difficulty getting a new circuit to work, set this option to ‘Controlled’, since it will work
in 2-wire and 4-wire situations, until you are confident that the circuit is 4-wire.
Poll Interval: The poll interval indicates the minimum amount of time between the start
of each poll cycle. A timer begins at the start of a poll cycle, and if the cycle is completed
and the interval has not been met, then the CNA-8000 will wait until the interval lapses to
begin the next poll cycle.
Line Protocol: Currently SDLC is the only protocol supported for this interface.