Visara LINCS Features - Manual (Page 49)

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Chapter 5. Host Connectivity
707021-001
Management – The Display/Update Host Connections utility displays all configured devices
(Network and Direct Devices), and the host resources being used by those devices. This utility
displays the host resources currently being used by all LINCS devices. Host connections may
be also be disconnected using this utility.
Additional information about managing ASCII host connections is given in the
following sections.
3270 Host Connectivity
3270 Host Connectivity is achieved using a wide range of link protocols carrying SNA, BSC,
or non-SNA traffic. The various link protocols which may be used to communicate to a 3270
host are listed in the section titled 3270 Host Protocols. The features offered in 3270 Host
Sessions are also discussed.
Sessions that LINCS has with 3270 hosts are called host circuits. A host circuit is a logical
host connection on the physical line. Each physical unit (PU) address on a line corresponds to
one host circuit. You must define a host circuit for every PU that is not gateway’d.
Host Protocols
This section describes the BSC, Channel/SNA, Channel/Non-SNA, Frame Relay, DLUR, LLC,
SDLC , SNA, TCP/IP, SNA Encapsulation, TN3270 Client, and X.25 protocols that LINCS
can use to communicate with a 3270 host.
BSC
BSC Host Circuits are supported only on SCC lines. To configure a BSC Host Circuit, set the
Line Protocol to BSC on a Line Options panel, and define a BSC Link Profile.
Channel/SNA
Channel/SNA Host Circuits are supported on CHP lines. To configure a Channel/SNA Host
Circuit, set the Line Protocol to Channel/SNA on a Line Options panel, and define a Channel/
SNA Link Profile.
Channel/Non-SNA
Channel/SNA Host Circuits are supported on CHP lines. To configure a Channel/Non-SNA
Host Circuit, set the Line Protocol to Channel/Non-SNA on a Line Options panel, and define
a Channel/Non-SNA Link Profile.
Frame Relay
LINCS provides a direct native connection to Frame Relay networks on HSC lines. All data is
packaged according to the formats described by RFC1490. When operating as a DSN, a LINCS
node can provide access to any host connected to the Frame Relay network.
To configure a Frame Relay Host Circuit, define an HSC line with Frame Relay as the line
protocol. Then define an LLC Link Profile, which will be assigned to the Frame Relay Host
Circuit on the Host Circuit panels.