Features

• Aggregates and switches Fast Ethernet traffic over eight E1 or T1 ports
• Connects up to eight remote sites via framed or unframed E1 or T1 lines
• Connects up to 248 or 192 remote sites via channelized E1 or T1 lines
• Provides QoS utilizing four Seamless connection of customers between TDM and packet-based networks
• Enables transparent Ethernet services utilizing VLAN tagging and stacking
• Lower equipment and maintenance costs than existing alternatives SNMP management

Description

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.