Parameter Function
NRZ/NRZI Specifies line support: Non-return to Zero or Non-return to Zero Inverted.
Half-/Full-Duplex Specifies how server communicates with downstream PU.
Constant/Switched Specifies how server controls Carrier Request To Send signal to a modem.
Transmit Clocking Specifies transmit clocking type: Internal or External.
Region/Country ISDN Standard
Australia AUSTEL TS013
Europe Euro ISDN (CTR 4)
France VN-3
Japan INS-64
North America National ISDN-1,AT&T 5ESS,Northern Telecom DMS-100
Table 1 SDLC Parameters
Table 2 Supported ISDN Signaling Specifications
ports the IEEE 802.5 Media Access
Control (MAC) token passing protocol,
the 802.2 Type 1 (connectionless)
protocol, the 802.2 Type 2 (connec-
tion-oriented) protocol, and the
16 Mbps Early Token Release (ETR)
protocol.
Synchronous The Synchronous
interfaces support V.35, RS-232,
RS-449/422 balanced, and X.21. Each
Synchronous interface operates from
1,200 bps to 2.048 Mbps, full duplex,
allowing use of lines up to T1 and E1
rates. Internal and external clocking,
as well as all major wide area net-
working protocols, are supported by
the Synchronous interfaces.
Alternatively, the Synchronous inter-
faces can be configured to integrate
IBM SDLC traffic across the internet-
work by connecting local or remote
IBM equipment directly to the
Synchronous interface and using
either integrated DLSw for SDLC or
Transparent Synchronous Pass-
Through. PU Type 2.0 and 2.1
devices are supported to provide a
highly flexible interconnection solu-
tion. The Synchronous interfaces
support connection to these devices
using a V.24 (RS-232), V.35, or X.21
physical interface. Additionally,
the Synchronous interfaces ensure
optimum SDLC performance by
supporting numerous SDLC param-
eters (see Table 1).
ISDN Basic Rate Interface (BRI)
The BayStack AN ISDN BRI option
provides two 64 kilobit-per-second
(Kbps) B channels for data and one
16 Kbps D channel for signaling.
The ISDN BRI feature supports many
signaling specifications (see Table 2).
This feature is supported on the
single Ethernet, single Token Ring,
and Ethernet/Token Ring BayStack
AN router, and the BayStack ANH
router/hub models. If an ISDN BRI
port configured with two B channels
and one D channel is enabled, only
one synchronous port (COM2) is
active.
T1/Fractional T1 (FT1) Data
Service Unit/Channel Service Unit
(DSU/CSU) The T1 and FT1
DSU/CSU module offers high-speed
connectivity to the digital services
networks in North America. It is capa-
ble of operating at fractional T1 rates,
in increments of 64 Kbps, up to 1.544
Mbps. Users can customize the DS-0s
in the FT1 connection. For example,
users can select DS-0 # 1, 5, 15, and
18 to make up a 256 Kbps fractional
T1 link. This module is designed to
support one logical channel per one
physical interface, typical of a remote
branch office requirement. Extensive
diagnostic and test functions, such
as loopbacks and bit error rate test
(BERT) tests, are also built in for
easy troubleshooting.
E1/Fractional E1 Adapter Module
The E1 and Fractional E1 (FE1)
adapter module provides a 2.048
Mbps G.703 interface for high-density
access to a variety of international
communications services.
Data Sheet BayStack Access Node and Access Node Hub 5
(162 pages)
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