Microsens Ethernet Media Converter in industrial design - Manual (Page 5)

Ethernet Media converter for industrial use Page 5/6
MICROSENS GmbH & Co. KG - Kueferstraße 16 - 59067 Hamm / Germany - Tel. +40 (0) 23 81/94 52-0 - FAX -100 -
www.microsens.com
Link Transparency
At most of the application the connection states of each segment is monitored by
the management of the central switch or hub. Using media converter has the
problem that the connection is divided in two different segments. It can happen
that an interruption in one segment is not noticed in the other segment. To avoid
this problem these media converter have the integrated “Link Through”
functionality which is forwarding the link status from one segment to the other.
To ensure that the network management can read the connection status, the
converter has additional integrated features such as Link Through and Advanced
Link Monitor (ALM). The Link Through forwards the connection status to the
converted segment. Due to this the fiber port is interrupted if the twisted pair
connection fails and vice versa.
TP
Manage-
ment
alarm
No link
Central side with
network management
Office side,
sub distribution,...
Converter with
Link Through
Remote
side
Additional to Link Through the loss of the transmitting optic fiber can be
recognized by Advanced Link Monitor (switch ALM FX: on). In case of loss of the
fiber port, the copper and the fiber port is switched off (see Fig. 9). This ensures
that the central network components can determinate this failure exactly.
TP Fiber
No Link
No Link
No Link
Converter with
activated ALM
office,
sub distribution,...
Converter with
deactivated ALM
Remote
Side
Media converter with integrated ALM feature can be combined with all central
equipment (e.g. switches, hubs, bridges).
Attention: To ensure the correct setup of the connection, only one side of the
connection should have activated ALM.