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RAD Data Communications 2010 Catalog
P A C K E T S W I T C H E S
The SPS-4X is a multiprotocol packet switch,
providing X.25, Frame Relay and HDLC data
connectivity across packet switched networks.
The SPS-4X is therefore ideal for hospitals,
universities, or other organizations with
distributed locations and a large installed base
of legacy equipment that needs to be
connected over next-generation networks to
reduce costs associated with network
connectivity and operations. The device also
enables seamless multi-site integration in the
military, banking, gaming, PoS, utilities, and
transportation sectors.
The SPS-4X employs pseudowire encapsulation
techniques, such as HDLCoPSN, to ensure
transparent data delivery between remote and
central locations. It provides up to three sync/
async links that can be independently
configured to deliver one of several protocols:
Frame Relay, X.25, ISDN, RIP, RIP-2, PPP, MLPPP,
HDLC, or async.
X.25 and XOT connectivity
The SPS-4X provides extended X.25 support,
including permanent virtual circuits (PVCs),
switched virtual circuits (SVCs) and multicasting,
as well as dial-up X.25 links.
In addition, the device allows X.25 traffic to be
carried over TCP/IP connections using the XOT
standard, supporting up to 16 simultaneous XOT
sessions over an IP network and ensuring third-
party interoperability.
HDLC and Frame Relay connectivity
Each of the device’s ports can be configured to
operate in transparent HDLC mode for
connecting bridges, routers and other HDLC
communication devices. This is achieved by
encapsulating the HDLC protocol over X.25,
Frame Relay or HDLCoPSN pseudowire
connections.
As a Frame Relay switch, the SPS-4X integrates
traffic belonging to the same data link
connection from several sources into a single
port. It also supports BECN/FECN signaling, rate
limiting and traffic shaping to handle congestion
and ensure QoS.
Backup links for mission-critical
applications
The SPS-4X supports an asynchronous backup
channel over PSTN and GPRS networks. For
example, the device’s asynchronous RS-232/
V.24 data port can be utilized as a radio backup
link for mission-critical applications,
automatically activating upon detection of main
link failure. When the network recovers, the
SPS-4X automatically synchronizes itself and
switches transmission back to the main facility
link.
The standalone SPS-4X is a compact, 1U-high,
half 19-inch wide unit, with a wide range of
AC/DC power supply options.
•
Delivers Frame Relay, X.25 and HDLC
over packet switched networks
•
Three synchronous/asynchronous data
ports
•
Two 10/100BaseT Fast Ethernet ports
•
Supports HDLCoPSN with up to 300
simultaneous PWE sessions
•
Standard XOT encapsulation per IETF
RFC 1613
•
High performance CPU: 10,000 pps
•
Dedicated GPRS backup channel
•
Routing and bridging capabilities
•
Cost-effective, single-box solution for
central and remote sites
•
Local and remote management
SPS-4X
Multiprotocol Packet Switch
FR/X.25
Network
Headquarters/
Regional Office
GPRS/ISDN/
PSTN
Network
IP
Network
SPS-4X
Synchronous
Backup
UTP
X.25/FR/
HDLC
UTP
LAN
SPS-4X
Synchronous
Backup
UTP
Remote Branch
Multiprotocol connectivity and backup between headquarters and a remote branch
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(40 Seiten)
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