LH1000 Multi-Standard Serial Converter

Satcomms

Base Band

Protocol Interfaces

LH1000

LH1000
Ethernet - HSSI or Multi-Standard Serial Converter

LH1000
Ethernet - HSSI or Multi-Standard
Serial Converter

Key Features

Low-cost LAN extension over satellite links
10 / 100BaseT auto-negotiating LAN port
Filtering of local packets
Efficient HDLC packet handling on WAN port
HSSI interface at up to 100 Mbps
Multi-standard serial interface supports RS-232, X.21, EIA-530, V.35, V.36 at up to 20 Mbps
Mixed Tx and Rx interface operation e.g. HSSI Tx & EIA-530 Rx
Asymmetric operation
Integral auto-sensing PSU

The Metrodata LH1000 is designed to enable the transmission of LAN frames across satellite links via serial modems. The LAN interface is auto-sensing and supports 10M, 100M, full or half duplex working. Manual selection of 100BaseT FD operation enables connection to fixed config router ports. It is presented as an RJ45 connector and offers automatic MDI/ MDI-X interface selection to obviate the need for cross-over cables.

The LAN interface utilises an efficient HDLC encapsulation with address learning and filtering at up to 148810 packets per second. Rate decoupling is supported by means of a 1000 packet SDRAM buffer store, and no packets are lost providing that the sustained data rate is below the DTE serial port speed.

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