Visara CNA-8000 Installation - Manual (Page 91)

CNA-8000 Installation and Configuration
707158-003 7-3
Line ID: This is a text field (alphanumeric plus underscore, dash, and period) that you
can enter a description for the line to make it more recognizable for management
purposes.
Line Speed: Most lines will be configured for ‘External’, indicating that a modem or
modem eliminator is to be attached that will provide the clocking for the circuit. If no
modem or modem eliminator are to be used and the CNA-8000 is to provide the clocking,
then you will need to set this option to one of the clocking speeds provided in the drop
down. The QSI card will attempt to provide the clocking signal for SDLC interfaces
when a value for any speed other than ‘External’ is set. When the CNA-8000 is providing
clocks, a special DCE adapter should be ordered to fit between the end of the QSI cable
and the end of the corresponding unit’s cable. This DCE adapter provides correct pin
configurations to support the clocking functions. Note that there are separate adapters
available for RS232 and V.35.
Supported clocking speeds are:
 4800 bps
 9600 bps
 14,400 bps
 19,200 bps
 56,000 bps
 64,000 bps
 128,000 bps
 T1 (1.544 Mbps) speed
 E1 (2.0 Mbps) speed
Duplex: There are three values for this option:
 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 for multi-drop lines, the CNA-8000 does not have to wait for a
response from one drop before a poll is sent to the next drop in the list. The
secondary PUs on the line should be set for Half Duplex. Outbound data takes
priority over polling a drop with no outbound data.
When using this on point-to-point lines, both the CNA-8000 and the secondary
station can be set for Full Duplex
 Half – RTS is switched. The CNA-8000 and the secondary PU(s) 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.
 HDXSP – The CNA-8000 will operate the same as when configured for ‘Half’
with one major difference. If the CNA-8000 has outbound data, sending the data
will take precedence over a scheduled poll to a drop.
DCE
Adapter
FEP-4600
(Providing Clocks)
AS400
Serial Interface
Cable Serial Interface
Cable