Visara LINCS Configuration - Manual (Page 72)

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LINCS Configuration
707023-003
XID Polling Interval for Inactive PUs
The value of this parameter represents how often an XID is sent to downstream inactive PUs
on the SDLC link by the DAP feature. A response to the XID by the downstream PU informs
LINCS that the device is available for communication. Note that no activity is initiated by
LINCS on the upstream side for the downstream PU until the downstream device responds to
the XID.
When PUID Override is enabled on the Gateway Circuits panel for a downstream PU, this
parameter indicates how often a SNA SNRM will be sent to an inactive PU.
Enter a value from 1-99 seconds, with a default of 30.
Final Considerations
Upstream LAN connections must be either configured in the host, or configured in the gateway,
if the upstream node is a gateway (such as another LINCS node). The upstream LAN address
corresponds to the gateway address, upstream from the DAP LINCS node. That is, the address
and GW SAP is where LINCS is to send data traffic from this particular DSPU when sending
data inbound.
The downstream connection addresses correspond to the addresses that must be configured in
the downstream devices. In most cases, you should set the TX Size parameter over an SDLC
link to 521. Note that 265 is the default (just like the NCP equivalent parameter of MAXDATA).
Increasing the value to 521 usually enhances the performance of the PU. Note that 3274 and
3276 devices support a maximum of 256.
BSC Line Options
Line Options/SCC1.0 LINCS C8.2 Central Control
Line Protocol: BSC
Request to Send - RTS: Controlled
BSC Line Code: EBCDIC
BSC DFT Response: WACK
SYNC Characters: 2
PF: 1-Menu 7-Back 8-Forw 9-Default 10-Done
The BSC Line panel allows you to select parameters specific to this protocol.
Request to Send (RTS)
This field allows you to specify the configuration of the Request to Send (RTS) signal. Toggle
to select one of these options:
• Controlled (Multipoint 2-wire) - Used when RTS is switched.
• Permanent (Point-to-Point 2-wire) - Used when RTS is held high. This option should
not be used when other LINCS nodes physically share the same line.
• BSC Special (Multipoint 4-wire) - RTS is held high while this LINCS node is selected.