User`s guide

INSTALLATION
Page 8 User’s guide ref 9014809-03 Failsafe ring SHDSL switch
th 2 SHDSL interfaces which allow to build
Ethernet network over kilometres at up to 2.3
le
s an adaptive data rate from 128 Kb/s up to 2.3
HDSL switch. For instance, the maximum distance between 2
Distance between neighbour switches
xpected over a
es).
c afe enough when the network
r if the process is critical for any
evices within less than 100 ms.
will be also recovered with all devices
2 or 4 ethernet RJ45 interfaces (depending on the
The XSRING comes wi
multidrop or failsafe ring
Mb/s.
The product also offers an inverse-multiplexing function making possib
to transmit at a data rate up to 4.6 Mb/s.
2.2.1 Data rate
Each interface feature
Mb/s.
The data rate is a function of the cable quality and the distance with the
next S
switches through a line is 13 Km (8 miles) with a 0.9 mm wire diameter
cable.
.2.2 2
The table in appendix 1 gives the data rate which can be e
line versus the length of the line (distance between 2 switch
.2.3 Failsafe ring operations 2
Daisy hain topology may not be s
comprises a large number of switches o
reason. Failsafe ring topology provides much more reliability :
If a line failure occurs, the communication will be recovered with all
d
If a SHDSL switch is in failure, or if the power is no longer supplied to
e product, the communication th
except the devices connected to the switch in failure.
In all cases, an alarm will be delivered (see Operation chapter).
2.3 Ethernet ports
The XSRING provides
product reference).