WCM1820: Managed Ethernet over 16-port E1/T1

Metrodata Limited

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WCM1820 Quotation
The WCM1820 Ethernet Extension Device is a low cost Carrier Ethernet Service delivery unit, offering end to end management using 802.3ah OAM, and customer site LAN extension from twisted pair 10/100/1000BaseT and 100Base/1000Base-X fibre over up to 16 Clear-Channel or Fractional E1/T1 leased line services.
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10/100/1000Base Ethernet Extension over 16-port Fractional E1/T1

WCM1820: the "plug and play" way to connect LANs together over up to E1 circuits
WCM1820: the "plug and play" way to connect LANs together over up to 16 E1 circuits
  • Ethernet Extension of 10/100/1000Base Ethernet over up to 16 Fractional E1/T1 services
  • 2 copper and 1 SFP fibre Ethernet connections, supporting a choice of fibre module
  • Link State Forwarding
  • Jumbo Frame Support (10kbyte)
  • 802.3ah OAM Support
  • 802.1q VLAN support (pass-through and tag switching)
  • 802.1p priority queuing (4 queues)
  • GFP mode for use with Aggregation equipment
  • RSTP support
  • TACACS+ for secure authentication
  • Zero Touch, Plug and Play Interface
  • LED status indicators
  • Compact modem style unit, built to European standards
  • Integral auto-sensing power supply (100-250V AC or -48V DC versions)
  • 12-24V DC power supply available on request
  • Easy to install & maintain
  • 1-port, 4-port and 8-port E1/T1 versions also available
  • BNC Version coming soon, details available upon request

WCM1820 delivering Ethernet Extension services from an MPLS core network

WCM1820 delivering Ethernet Extension services from an MPLS core network

This application shows an WCM1820 unit being used as the Ethernet Extension demarcation device to deliver a Carrier Ethernet service from an MPLS core network. A wide choice of Ethernet connectivity is available for the user via the 10/100/1000baseT and SFP fibre ports. OAM support means that the WCM1820 can be remotely managed by the central network management system using standards based OAM packets. GFP is supported allowing single ended use with aggregation platforms in the core network.

WCM1820 units performing Ethernet Extension service demarcation and media conversion

WCM1820 units performing Ethernet Extension service demarcation and media conversion

This application shows how a pair of WCM1820 units can be used to offer Ethernet Extension service demarcation and Ethernet Extension functionality either over up to 16 Fractional E1/T1 circuits.

WCM1820 units performing aggregation of services on multiple sites

WCM1820 units performing aggregation of services on multiple sites

This application shows how VLANs can also be used to select which site to forward user data to, e.g. when using a WCM1820 unit supporting sixteen E1 ports at a central site supporting up to four sites with WCM1100, WCM1400 or WCM1800 units each supporting up to eight E1 ports.


The WCM1820 is a switching media converter operating in store and forward mode. The WCM1820 supports auto-negotiation, and auto MDI/MDIX cross-over switching on the copper interface.

To ensure reliable operation, the WCM1820 supports Link State Forwarding, whereby a fault on the serial port will automatically force a link down on the user ports to indicate to the attached device that there is a link problem.

The WCM1820 supports the transmission of Jumbo frames.

The WCM1820 supports 802.3ah OAM which means that the Ethernet service can be managed and monitored right up to the customer delivery point. The future WCM1820 software development roadmap includes support for LACP, IEEE802.1ag and Y.1731 OAM standards.

The WCM1820 is provided with an SFP module with LC connector supporting for example 1000Base-SX for 550 metres operation over multi-mode fibre, or 1000Base-LX for up to 10km over a single-mode fibre.

The WCM1820 is ordered without an SFP fitted, although customers can subsequently change their interface type. Please contact Metrodata for price and availability of SFP modules including long haul, 1550nm, bi-directional and CWDM.

Compatibility:
  GFP mode for use with LAN Aggregation equipment

The WCM1820 is available in a choice of 100-250 VAC or -48 VDC integrated power supplies.

The WCM1820 can easily be rackmounted in either a 1U two unit rackmount kit, a 6U eighteen unit rackmount kit.

The WCM1820 is part of a wide range of LAN extension products from Metrodata.


WAN Port Specs
Port 16-port Fractional E1/T1 conforming to G.703
Interface
 E1: RJ45 (120 ohm)
T1: RJ45 (100 ohm)
Framing
 E1: G.704 (with or without CRC4) or unframed
T1: ESF
Line Coding
 E1: HDB3
T1: B8ZS
Bit Rate E1: 2.048Mbps +/- 50 ppm
T1: 1.544Mbps +/- 50ppm

1000Base-X Fibre Interface
Port IEEE802.3z 1000BaseX SFP
Interface Dual LC connectors

SFP 1000Base SX
Wavelength 850nm multimode
TX Power -9.5 to -3dBm
Max Rx input power 0dBm
Rx sensitivity -17 to 0dBm
Optical loss budget 7.5dB (550m)

SFP 1000Base LX
Wavelength 1300nm singlemode
TX Power -9.5 to -3dBm
Max Rx input power -3dBm
Rx sensitivity -19 to -3dBm
Optical loss budget 9.5dB (10km)

Dual 10/100/1000BaseT Electrical Interface
Port 2x 10/100/1000BaseT with auto-negotiation and Jumbo frame support
Interface RJ45 (Auto Crossover MDI/MDIX)
Operating mode Auto Negotiate, 10M, 100M, 1000M, Full Duplex, Half Duplex
LEDs Link, Activity, Speed

Compliance & Approvals
Safety EN60950
IEC60825-1 Class 1 Laser Eye Safety
EMC EN55022, EN50082

Environment
Temperature 0 - 50 deg C
0 - 95% RH, non condensing
Storage Temp -40 to 100 deg C
Pressure 86 - 106 kPa

Power Supply Options
-48 VDC -36 to -72V DC, 125 - 65 mA
AC Mains 100 - 250V AC, 50 - 60Hz, 60 - 25mA
Power Consumption 6 watts approx when operating

Packaging
Type 1U 19 inch Rackmount
Dimensions 435 x 213 x 43 mm (W x D x H)

Order Code
Product AC Mains: 100 - 250 VAC DC Power: -48 VDC
WCM1820 80-70-82542 80-71-82542

Product variants with 12V to 24V DC operation are also available on request.

If you require further information please contact our sales team with your requirements.

Commonly used SFP transceivers
 Order Code Description
1Gbps Multimode 550m 850nm
 80-31-011
 Multimode interface
fibre optic loss budget 7.5dB
1Gbps Singlemode 10km 1300nm
 80-31-031
 Singlemode interface
fibre optic loss budget 9.5dB
1Gbps Singlemode 40km 1300nm
 80-31-033
 Singlemode interface
fibre optic loss budget 18dB
1Gbps Singlemode 80km 1550nm
 80-31-042
 Singlemode interface
fibre optic loss budget 20dB
100Mbps Multimode 2km 1300nm
 80-30-021
 Multimode interface
fibre optic loss budget 8.5dB
100Mbps Singlemode 10km 1300nm
 80-30-031
 Singlemode interface
fibre optic loss budget 13dB
100Mbps Singlemode 40km 1300nm
 80-30-033
 Singlemode interface
fibre optic loss budget 20dB
100Mbps Singlemode 80km 1550nm
 80-30-042
 Singlemode interface
fibre optic loss budget 29dB

Other SFPs are available on request including long haul, 1550nm, CWDM and bi-directional.

Whilst the MetroCONNECT product range uses industry standard user exchangeable SFPs, it is recommended that these are purchased from Metrodata to guarantee their specification and compatibilty with each other.

If you require another SFP please contact our sales team with your requirements.


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