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 network.
The device can effectively utilize the
redundant bandwidth of telecom operators’ existing TDM network to transport Ethernet
data with low investment.
Applications:
This equipment may be used for the
following purposes:
1. Bridging Ethernet LANs over existing TDM
(E1) telecom network.
2. Extending Ethernet Networks utilizing TDM
(E1) landline based telecom infrastructure.
3. Using telecom network of E1s / PDH / SDH
Microwave etc. carrying E1s to transport Ethernet Data.
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.
NOTE: 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
switch settings.
Typical Application 2:
Discreet Link Mode:
In the “discreet link
mode” each LAN is bridged to, and can only talk to its corresponding LAN on the
remote side. It can not talk to any other LAN either at same side or the remote side. This
mode may be selected for use if the users do not wish to share the E1 link resources with
the other LANs being transported on the same E1 link.
Example: In
the discreet link mode, the LAN 1 (Ethernet Port 1 of the equipment) only can talk
to the corresponding LAN 1 (Ethernet Port 1 of the equipment) at remote side and can not
talk to any other LAN, either on remote side or same side.
Related Products:
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The VCL-4
Ethernet over E1 Converter provides the user with an option to transport Ethernet
(multiple LANs) over an E1 link. The equipment converts and transports upto 4 x Ethernet
links 
over an E1 in a shared* mode, or a discreet* mode, depending on the users
preference and selection.