Installation guide

SNA Protocol Support 23
Data travels from a workstation PC along the backbone to the SNA Gateway.
It is packaged into SNA frames and returned to the LAN so it can be collected
by an IBM controller or host.
Information returning from the host travels along the LAN to the Eiconcard in
the SNA Gateway where it is unpackaged and then sent to its destination PC
across the LAN.
ISDN Support
ISDN (Integrated Services Digital Network) provides end-to-end digital
connectivity to support a wide range of services.
Since ISDN standards vary from country to country, Eiconcard software has
been developed to suit the different implementations. Currently, Eicon
Networks supports the following ISDN implementations: NI-1 (North
America), INS-Net64 (Japan), TPH 1962 (Australia), EuroISDN (Europe), and
5ESS (AT&T proprietary).
ISDN support is provided through the C21, C91, S51, and S91 Eiconcards as
well as Eicon SNA Gateway software. The X.25/QLLC, SDLC, Eicon IDLC
and SNA over Frame Relay protocols are supported over ISDN.
The C21, C91, S51, and S91 Eiconcards support ISDN Basic Rate Interface
(BRI) connections. BRI is defined as two 64kbps B Channels and one 16 kbps
D Channel. The B Channels are protocol independent and can carry X.25,
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IBM AS/400
X.25
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3745
IBM Mainframe
QLLC/ISDN
Links
SDLC/ISDN
Link
Terminal
Adapter
Client Workstation
(SNA LAN Gateway only)
Gateway PC
Client Workstation
(SNA LAN Gateway only)
Client Workstation
(SNA LAN Gateway only)
Connecting to IBM hosts over ISDN lines with Eicon SNA Gateway