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RAD Data Communications 2011 Catalog

CONVERTERS AND CONNECTIVITY

enables service providers and enterprises to

provide transparent Ethernet Private Line

(point-to-point) services at granular rates from

fractional to full E1 or T1. The Egate-20

supports differentiated services by classifying

user traffic according to VLAN priority

(802.1p), DSCP, IP Precedence, and per port.

Egate-20 immediately detects E1/T1 loops

when they occur and closes the bridge port to

avoid Ethernet storms. Once the E1/T1 loops

are released, Egate-20 reverts to normal

operation.

Since the Egate-20 functions as a bridge

operating over a PDH 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 stacking (Q-in-Q) capabilities,

a special provider VLAN is added to the user

traffic. This allows transparent delivery of the

user traffic, 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.

SNMP management

The Egate-20 features flexible management

capabilities, including local management via an

ASCII terminal (RS-232). In addition, remote

management can be performed either inband

or out-of-band, using the network or user

ports, while maintaining separation between

management and user traffic via the use of

VLANs. Advanced FCAPS (Fault, Configuration,

Administration, Performance, Security) and

diagnostic tools are provided by

RADview-EMS, RAD’s carrier-class element

management system, via a Web browser.

The Egate-20 also supports a variety of access

protocols, including Telnet, SNMP, Web server,

and TFTP. A DHCP server is employed to

provide IP address, IP mask and default

gateway, automatically saving set-up time.

The Egate-20 provides eight E1 or T1 ports and

four 10/100BaseT user LAN ports. For

management, it is equipped with a dedicated

10/100BaseT management port. It is available

as a compact, 1U-high, half 19-inch wide,

standalone device in a metal enclosure.

•

Aggregates and switches Fast Ethernet

traffic over eight E1 or T1 ports

•

Connects up to 248 or 192 remote sites

via channelized E1 or T1 lines

•

Loop detection of TDM ports to avoid

Ethernet storms

•

Provides QoS utilizing four priority

queues according to VLAN priority field

(802.1p), DSCP, IP Precedence, or

per port

•

Enables transparent Ethernet services

utilizing VLAN tagging and stacking

•

Competitive equipment and

maintenance costs

Aggregation of Ethernet services over channelized E1 or T1 lines

Ethernet

DACS

POP

8xE1/T1

nxE1/T1

10/100BaseT

SDH/SONET

Egate-20

POP/CO

RemoteSites

RICi-E1

Ethernet

FE1

E1/FE1

RICi-T1

T1/FT1

Up to 248 sites

Packet

Switched

Network

Egate-20

Ethernet over TDM Aggregation Gateway

For latest updates visit www.rad.com

The Egate-20 is an Ethernet to TDM gateway for

interconnecting channelized E1s or T1s and packet

networks. The Egate-20 is typically deployed in a

central location, aggregating user LAN traffic

received from remote devices, such as RAD's RICi

and FCD products. Together with these remote

units, the Egate-20 constitutes a full access

solution from the service provider central site to

the customer premises.

Carrier Ethernet services

The Egate-20 can connect up to eight remote

LANs over framed or unframed E1 or T1 circuits, or

248 or 192 remote LANs over fractional E1 or T1

circuits, respectively. This unique capability

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