WC3445: Ethernet over E3/DS3 Extender

Metrodata Limited

The WC3445 LAN extender offers a simple "plug and play" method to extend a LAN connection between multiple sites over E3 or DS3.

The integrated 4-port LAN switch supports local switching, thereby removing the need for external switches or hubs in smaller LAN installations.
Front: WC3445 Rear: WC3445 - Ethernet over E3/DS3

LAN Extension over E3 and DS3 leased lines

WAN-in-a-Can: the "plug and play" way to connect LANs together over the WAN
  • Must be used in pairs
  • Feature rich LAN extender over E3 or DS3 leased lines
  • Quad port Ethernet switch on subscriber side, with wirespeed local switching
  • 4 Auto-negotiating subscriber 10/100 BaseT ports, with auto MDI/MDIX switching
  • Wire speed filtering of local packets
  • Efficient HDLC encapsulation on WAN port: 82236 packets per second on DS3
  • Easy to install & maintain
  • Integral auto-sensing power supply (100-250V AC or -48V DC versions)
  • 12-24V DC power supply available on request
  • Compact modem style unit, built to European standards
  • Rack mounting kits for 2 or 18 units available
  • Quad option available with 4 WC3445 units in a 1U box
Related Products
  • WAN-in-a-CAN - overview of product family
  • WC1000 - quad 10/100baseT switch with E1 uplink
  • WC X.21 - quad 10/100baseT switch with X.21 uplink
  • WC V.35 - quad 10/100baseT switch with V.35 uplink
  • WCM1000 - quad 10/100baseT switch with E1 uplink and remote management
Applications
  1. Connecting two LANs together using an E3 leased line
  2. Connecting two LANs together using an unframed clear channel DS3 leased line

Connecting two LANs together using an E3 leased line

LAN extension over E3

This application shows two LANs connected together using an E3 leased line, such as a BT Megastream-34 circuit. As a plug and play Ethernet switching device the WC3445 is a straight forward and cost effective alternative to the use of routers in small and medium sized networks.

Connecting two LANs together using an unframed clear channel DS3 leased line

LAN extension over DS3

This application shows two LANs connected together using an unframed clear channel DS3 leased line, such as a BT Megastream-45 circuit. As a plug and play Ethernet switching device the WC3445 is a straight forward and cost effective alternative to the use of routers in small and medium sized networks.

N.B. Care must be taken when using the WC3445 with services which are terminated in North America as the WC3445 requires clear channel DS3 circuits for correct operation.

Full wirespeed switching and filtering between the 10/100 BaseT LAN ports is supported so that only packets destined for the remote site are forwarded over the E3 or DS3 leased line.

In most installations the WC3445 requires no configuration, and is therefore truly "plug and play". The subscriber ports perform auto-negotiation and support both 10M and 100M operation in full duplex (FD) or half duplex (HD) modes. Manual selection of 100M FD operation enables connection to fixed router ports. Cabling issues are minimised through the use of automatic MDI/MDIX selection on these ports.

The highly efficient HDLC encapsulation of packets ensures that maximum throughput is achieved on the WAN link. Internal packet buffering enables each WC3445 to smooth out bursty traffic without packet loss.

In auto-negotiation mode the maximum packet size (MTU) is 1518 bytes for non-tagged frames and 1522 bytes for VLAN frames which is sufficient for passing single tagged 802.1q VLAN frames. In fixed 100M full duplex mode the MTU is 1536 bytes which is sufficient to transport double VLAN tagged frames (Q-in-Q).

The WC3445 can easily be rackmounted in either a 1U two unit rackmount kit, in a 6U eighteen unit rackmount kit or are available in a 1U quad box (1U rackmountable unit containing 4 x WC3445 units).


Subscriber Port
No. of Ports 4
Presentation 10/100 Base TX, RJ45, Auto-MDI/MDI-X
LED Support Link / Activity & Speed
Operating Mode Auto-negotiate for 10/100, Full or Half Duplex
Port Filtering Rate 148810 packets/second
Port Switching Rate 148810 packets/second
Switch Mode Any to any
MAC Address Table 4096 entires
Packet Size 64 bytes minimum
1522 bytes maximum (auto negotiation mode), 1536 bytes maximum (fixed 100M FD mode)

WAN Port Specs

 WC3445 WC3445
Mode E3 DS3
Presentation BNC (75ohm) BNC (75ohm)
Line Rate 34.368Mbps 44.736Mbps
Frame Mode Unframed Unframed
Timing Internal/loop Internal/loop
Encapsulation HDLC HDLC
Max Packet Rate 64120 82236
LEDs Tx/Rx Packet, Alarm Tx/Rx Packet, Alarm
Alarms LOS LOS
Diagnostics External loop External loop

Packaging
Type Modem, 1U high without feet

Dimensions W x D x H mm
Rackmount 202 x 132 x 44 (without feet)
Desktop 202 x 132 x 48 (with feet)

Environment
Temp 0 - 50 deg C
Humidity 95% RH, non-condensing
Pressure 86 - 106 KPA

Power Supply
AC Mains 100-250VAC, 50-60Hz, 60-24mA IEC Connector
-48VDC -40 to -72VDC, 200-100mA


Order Code

Product

 AC Mains: 100 - 250 VAC DC Power: -48 VDC
WC3445 80-05-542 80-21-542
2 Unit Rackmount Kit 80-05-256 80-05-256
18 Unit Rackmount Kit 80-05-250 80-05-255
Quad WC3445 80-405-542 80-421-542

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