Front: LHM1000 Ethernet to HSSI serial
Rear: LHM1000 Ethernet to HSSI serial

1Gb Ethernet to HSSI Serial

The LHM1000 Ethernet Converter is a Carrier Ethernet Service delivery unit, offering end to end management using 802.3ah OAM, and customer site conversion from twisted pair 10/100/1000BaseT and 100Base/1000Base-X fibre to HSSI Serial leased line services.

Ethernet Converter of 10Mb/100Mb/1Gb Ethernet to HSSI Serial

  • Dual RJ45 plus single SFP flexible media port, offering local Switched Ethernet connections up to 1Gbps
  • Mini Jumbo Frame Support (up to 2048bytes)
  • Fully manageable via Serial Terminal (user-friendly context-sensitive menu system), Telnet/SSH, SNMP and Web Browser
  • 802.3ah Carrier Ethernet OAM protocol support, for Connectivity Management
  • TACACS+ for secure authentication
  • 802.1q VLAN support (pass-through and tag switching)
  • Traffic prioritisation based on 802.1p and/or DSCP markers
  • Bandwidth control per Ethernet Port and Priority queue (also for Broadcast traffic), enabling differentiated traffic QoS
  • Link Loss Forwarding
  • RSTP support
  • LED status indicators
  • Alarm Extension Relay
  • Robust metal casing, made in the UK to high quality standards
  • Integral auto-sensing power supply (100-250V AC or -48V DC versions)
  • 12V & 24V DC PSU variants also available on request
  • Easy to install & maintain
  • Rack mounting kits for 2 or 18 units available
LHM1000: the "plug and play" way to connect LANs together over a HSSI serial circuit
LHM1000: Managed Ethernet connectivity over a HSSI serial circuit

The LHM1000 is a switching media converter operating in store and forward mode. The LHM1000 supports auto-negotiation, and auto MDI/MDIX cross-over switching on the copper interface.

To ensure reliable operation, the LHM1000 supports Link Loss 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 LHM1000 supports the transmission of Mini Jumbo frames (2048bytes).

The LHM1000 supports 802.3ah OAM which means that the Ethernet service can be managed and monitored right up to the customer delivery point. The future LHM1000 software development roadmap includes support for LACP, IEEE802.1ag and Y.1731 OAM standards.

The LHM1000 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 LHM1000 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.

The LHM1000 is available in a choice of 100-250 VAC or -48 VDC integrated power supplies.

The LHM1000 can easily be rack mounted in either a 1U two unit rack mount kit , a 6U eighteen unit rack mount kit.

The LHM1000 is part of a wide range of LAN extension products from Metrodata.

LHM1000 delivering Ethernet services from an MPLS core network
LHM1000 delivering Ethernet services from an MPLS core network

This application shows an LHM1000 unit being used as the Ethernet 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 LHM1000 can be remotely managed by the central network management system using standards based OAM packets.

LHM1000 units performing Ethernet service demarcation and media conversion
LHM1000 units performing Ethernet service demarcation and media conversion

This application shows how a pair of LHM1000 units can be used to offer Ethernet service demarcation and LAN Extension functionality either over a HSSI Serial circuit.

WAN Port Specs
Interface HSSI
Presentation 50 way AMP
Line Rate 52Mbps (max)
1000Base-X Fibre Interface
Port IEEE802.3z 1000BaseX
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)
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
Temperature 0 - 50 deg C
Humidity 0 - 95% RH, non condensing
Storage Temp -40 to 100 deg C
Pressure 86 - 106 kPa
Power Supply Options
-48 VDC -40 to -72V DC, 125 - 65 mA
AC Mains 100 - 250V AC, 50 - 60Hz, 60 - 25mA
Power Consumption 6 watts approx when operating
Type Modem, 1U high without feet, IP30C
Dimensions W x D x H (mm)
Rack mount 202 x 132 x 44 (without feet)
Tabletop 202 x 132 x 48 (with feet)
Order Code
Product AC Mains DC Power
LHM1000 80-70-544
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2 unit rack mount kit 80-05-256
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18 unit rack mount kit 80-05-250
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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
10Gbps Multimode 550m 300nm 80-38-011
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Multimode interface
fibre optic loss budget 5.1dB
10Gbps Singlemode 10km 1300nm 80-38-031
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Singlemode interface
fibre optic loss budget 6.3dB
1Gbps Multimode 550m 850nm 80-31-011
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Multimode interface
fibre optic loss budget 7.5dB
1Gbps Singlemode 10km 1300nm 80-31-031
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Singlemode interface
fibre optic loss budget 12dB
1Gbps Singlemode 80km 1550nm 80-31-042
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Singlemode interface
fibre optic loss budget 24dB
100Mbps Multimode 2km 1300nm80-30-021
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Multimode interface
fibre optic loss budget 12dB
100Mbps Singlemode 10km 1300nm80-30-031
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Singlemode interface
fibre optic loss budget 17dB

Need to add more SFP's to your quote?

To see more of Metrodata's SFP offering of Fibre Transceivers, click here.

Many other transceivers are available on request including long haul, 1550nm, CWDM, DWDM and bi-directional.

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

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

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Further Information

Related Products

MetroCONNECT Ethernet Service Delivery Products - Standalone Units
Ethernet Media Converters

Networking The World