The user may select this mode if the
user desires that all of the 4 x Ethernet links that are being
transported over the same E1 to optimally share its bandwidth
resources and where discretion is not consequential.
In the discreet* mode
(please see application diagram below) all 4 Ethernet channels are
transported over the same E1 link without intrusion or access to
each others path without any sharing. The user may select this mode
if the user desires that all of the 4 x Ethernet links that are
being transported over the same E1 to maintain discretion without
allowing access to each other.
The equipment shall
always be installed and used in pairs, with one terminal being
installed at either end (each side) of the network.
The VCL-4 Ethernet over
E1, E1/4*10(100)Base-T Interface Converter is an ethernet extension
device utilizing TDM telecom infrastructure (the telecom network of
E1s, or of PDH, SDH and E1/E3/SDH microwave etc. carrying E1s).
The VCL-4 Ethernet over
E1, E1/4*10(100)Base-T Interface Converter converts the Ethernet
Data into E1 frame format for transmission over the existing TDM
(E1) links and then reconverts the E1s back into Ethernet Data at
the far-end terminal. It function is to primarily provide a BRIDGE
between two Ethernet LANs over the existing E1 based telecom
The device can
effectively utilize the redundant bandwidth of telecom operators’
existing TDM network to transport Ethernet data with low investment.
This equipment may be
used for the following purposes:
Bridging Ethernet LANs
over existing TDM (E1) telecom network.
Networks utilizing TDM (E1) landline based telecom infrastructure.
Using telecom network
of E1s / PDH / SDH Microwave etc. carrying E1s to transport
In all these cases the
equipment be always installed and used in pairs, with one terminal
being installed at either end (each side) of the network
Typical Application 1
Shared Link Mode
In the “shared link
mode”, each LAN can view and talk to other LANs. Example: each
LAN can view and talk to all other LANs at same site or the
corresponding remote side. This mode may be selected for use if
bandwidth optimization and usage is of prime importance and the user
is not averse to sharing the E1 link resources with the other LANs
being transported on the same E1 link.
In the “shared link mode”, the VLAN
switch must be OFF (The ethernet ports are not isolated to each
other on both sides of the E1 link. Please refer to page 6 for VLAN