WC3445: Ethernet over E3/DS3 Extender

Metrodata Limited

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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.

WC3445 Datasheet

WC3445 Manual

LAN Extension over E3 and DS3 leased lines

Please Note:

The WC3445 has been superceded by the newer more flexible WCM3100 unit which offers improved functionalilty.

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
Higher specification MetroCONNECT managed LAN extenders are also available

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WC X.21 - quad 10/100baseT switch with X.21 uplink, superceded by WCM_Serial
WC V.35 - quad 10/100baseT switch with V.35 uplink, superceded by WCM_Serial

Applications

Connecting two LANs together using an E3 leased line
Connecting two LANs together using an unframed clear channel DS3 leased line

Application Diagrams
Product Features
Specifications
Ordering Info
Alternative Products

Connecting two LANs together using an E3 leased line

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

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, IP30C

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