Visara FEP-4600 Planning Guide - Manual (Page 12)

Chapter 1. FEP-4600 Overview
1-4 707117-003
SDLC-Attached PU 2.0 Controllers
The FEP-4600 provides SDLC support for PU 2.0 controllers. SDLC connections are
through the QSI card. Each QSI card support 4 independently configurable serial
interfaces. Line speeds up to E1 and T1 are possible on every line. SDLC-attached
platforms are supported by the FEP-4600 using an XCA PU 2.0 gateway feature. Host
connections are through ESCON or FICON connections. SDLC lines for supporting PU
2.0 platforms can be supported as point-to-point or as multidrop connections. Leased
Line and Dial-in connections are supported. Frame sizes from 265 bytes up to 4105 are
supported. The FEP-4600 can support DTE and DCE connections, using RS232 and V.35
physical interfaces. X.21 connections require a V.35/X.21 or RS232/X.21 converter. Note
that each QSI card supports a single type of physical interface (RS232 orV.35). DCE
connections require a DTE to DCE adapter provided by Visara for each line to be run as a
DCE.
With ESCON or FICON as the upstream connection, PU 2.0 platforms on SDLC lines are
defined as Switched Major Nodes connecting through an XCA gateway.
Dial-in controllers are switched to the proper channel connection based on PUID settings
configured in the downstream controller, and mapped to the proper upstream connection
via the configuration in the FEP-4600.
Dial-out connections are not currently supported.
SDLC-Attached PU 2.1 Nodes
PU 2.1 nodes are supported through the FEP-4600 using the XCA gateway mechanism.
The downstream PU 2.1 node is defined on the ESCON or FICON interface as a
Switched Major Node PU TYPE=2 (and XID=YES) in VTAM. PU 2.1 platforms are
supported over point-to-point connections. The FEP-4600 can support DTE and DCE
connections, using RS232 or V.35 physical interfaces. X.21 connections are supported
using an RS232/X.21 adapter or V.35/X.21 adapter. DCE connections require a DTE to
DCE adapter provided by Visara for each line to be run as a DCE.
Dial-in controllers are switched to the proper channel connection based on PUID settings
configured in the downstream controller, and mapped to the proper upstream connection
via the configuration in the FEP-4600.
Dial-out connections are not currently supported.