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The Egate-20 Ethernet-over-Channelized E1/T1 Gateway can
connect up to eight remote LANs over framed or unframed E1
or T1 circuits, or 248 or 194 remote LANs over fractional E1
or T1 circuits, respectively. The device also supports
differentiated services on the VLAN and IP layer with four
priority queues forwarding per 802.1p, DSCP and IP
precedence.
This unique capability enables service providers and
enterprises to provide transparent Ethernet Private Line
(point-to-point) or Ethernet Private LAN (multipoint)
services at granular rates similar to fractional E1 or T1.
The Egate-20 Ethernet over Channelized E1/T1 Gateway
interconnects TDM and packet networks. It is part of the
Egate Channelized Gateway product line, a new breed of
products integrating advanced Ethernet bridging with fully
channelized TDM capabilities. The Egate-20 is typically
situated in a central location, aggregating user LAN traffic
received from remote devices such as RAD�s RICi intelligent
converters, FCD network access units and ASMi short range
and SHDSL modems, thus completing a full access solution
from the service provider central site to the customer
premises.
Since the Egate-20 functions as a bridge operating over a
G.703/G.704 environment, a seamless interconnection between
customers connected over the TDM network and customers
connected over the packet network can be achieved while
maintaining the same service level attributes. It replaces
current solutions based on expensive multiple channelized
E1/T1 routers or multi-box solutions based on cross connects
and switches. For the service provider this means simplified
operations and considerably reduced costs for channelized
bridge applications. The Egate-20 maps Ethernet user traffic
over complete E1/T1 clear channels or bundles of timeslots
assigned to a specific bridge port (VLAN), in effect
creating a virtual port interconnecting the packet and the
TDM networks.
Using the VLAN tagging and stacking (Q-in- Q) option, a
special provider VLAN is added to the user traffic. This
allows transporting the user traffic transparently, keeping
all the user VLAN settings intact, and enables a seamless
hand-off to the packet network. VLAN switching permits
specific VLANs to be forwarded to virtual ports, while
blocking others. With this feature, it is possible to define
different traffic profiles for members of different VLAN
domains. Management traffic is given a common profile,
creating one broadcast domain in which all users are managed
over a single VLAN. Egate-20 is controlled using in-band or
out- of-band (SNMP, Telnet, WEB) management. Management
traffic and user Ethernet traffic are transported together
on the same Ethernet flow, separated by different VLANs.
This allows for complete separation between user traffic and
management traffic, ensuring management and user traffic
security. Local management can be performed via an ASCII
terminal. A DHCP server is employed to provide IP address,
IP mask and default gateway, automatically saving precious
set-up time.
The Egate-20 provides eight E1 or T1 G.703 and G.704 ports
and three 10/100BaseT user LAN ports. For management it is
equipped with a dedicated 10/100BaseT management port, as
well as an RS-232 port for direct connection to a console.
It is available as a compact 1U high, half 19-inch wide,
standalone device in a metal enclosure.
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