Visara FEP-4600 Installation - Manual (Page 98)

Chapter 8. 3270 Bisync Interface
8-4 707119-001
• Full – RTS is kept active to reduce turnaround time. If you are connected to a 2-
wire circuit, you must not use this setting.
When using this on point-to-point lines, both the FEP-4600 and the secondary
station can be set for Full Duplex
• Half – RTS is switched. The FEP-4600 and the secondary station take turns
communicating over the line.
For multi-drop lines, each drop is polled in order, regardless of whether there is
outbound data for one of the drops.
Poll Timeout: This value determines how long the FEP-4600 is to wait for a response
before continuing through the poll list.
Line Type: The options for this are either ‘Leased’ or ‘Dial’. If the remote platform will
be dialing in, then set the Line Type for ‘Dial’. Otherwise set it for ‘Leased’.
Line Speed: The line speed option is only used if the interface is configured for DCE
mode. Otherwise clocking speed is provided by the modem or modem eliminator. If no
modem or modem eliminator are to be used, then you will need to set this option to one
of the clocking speeds provided in the drop down. The QBA card provides the clocking
signal for Bisync interface. This option is normally used in coordination with using a
DCE cable for direct attachment to the platform that the FEP-4600 is communicating
with. Supported clocking speeds are:
• 1200 bps
• 2400 bps
• 4800 bps
• 9600 bps
• 19,200 bps
• 38,400 bps
• 56,000 bps
Block Size: The block size determines the maximum size block of data that will be sent.
A block size of 4096 is typical for 3270 Bisync.
Data Format: Two options are allowed, EBCDIC and ASCII. Most attached equipment
performing 3270 Bisync protocol will use EBCDIC as the character set.
Interface: This option should be set to match the type of modem interface cable that is
being used. The options are for RS232 (25-pin D) connector, or V.35 (large block)
connector.