FM4900: E3 to HSSI Converter

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The Metrodata FM4900 DSU is used to interface high performance DTE equipment such as bridges or routers with HSSI interfaces to 34.368Mbps E3 leased line services.

Front: FM4900FM4900 rear

E3 34.368Mbps G.703 to HSSI Converter

FM4900 as an E3 to HSSI Converter
FM4900 as an E3 to HSSI converter
  • High Spec E3 G.703 34.368Mbps interface
  • HSSI port for router connection
  • External Alarm relay port
  • Local management port for configuration and diagnostics
  • Remote configuration and testing of units across the network
  • Comprehensive performance monitoring of both device and line
  • Built to European Standards
  • Optional remote management using SNMP and Telnet
  • Optional -48 volt DC supply

Router Applications

FM4900 connecting an HSSI router to an E3 34.368Mbps leased line

FM4900 connecting an HSSI router to an E3 34.368Mbps leased line

This application shows an FM4900 connecting an HSSI router card to an E3 34.368Mbps leased line, such as a BT Megastream-34 service. HSSI serial ports are often the most cost effective high speed WAN port available on routers. Telecom carriers provision E3 34.368Mbps services with G.703 connectivity. Care must be taken to ensure that this equipment is not used in conjunction with cell based E3 equipment, such as some router cards.

HSSI routers connected together via an E3 34.368Mbps leased line using FM4900 units

HSSI routers connected together via an E3 34.368Mbps leased line using FM4900 units

This application shows a pair of FM4900 units connecting a pair of HSSI routers via an E3 34.368Mbps leased line, such as a BT Megastream-34 service. HSSI serial ports are often the most cost effective high speed WAN port available on routers. Telecom carriers provision E3 34.368Mbps services with G.703 connectivity. Care must be taken to ensure that this equipment is not used in conjunction with cell based E3 equipment, such as some router cards.

LM1100 SNMP Enabler used with Management Data link to manage a pair of FM4900 units

FM4900 remote management using LM1100 and datalink

This application show a remote network management centre controlling the head office FM4900 via an LM1100 SNMP Enabler card allowing comprehensive management access including the full range of configuration changes, diagnostics and status analysis using either SNMP or Telnet, including SNMP traps. In this application a remote management data link has also been enabled to the remote FM4900 unit, allowing remote SNMP and Telnet access into this unit.

The FM4900 offers conversion between an HSSI serial interface and an E3 line interface with BNC connectors. The FM4900 should NOT be used in conjunction with cell based E3 equipment, such as some router cards.

The FM4900 has several LEDs for displaying current status, plus comprehensive configuration and diagnostics via a menu driven user interface.

Using a dedicated management channel pairs of FM4900 units can communicate with each other, allowing configuration and status checking of the remote unit.

The optional Metrodata LM1100 SNMP enabler permits remote management via either Telnet or SNMP.

Line E3 Interface
Port G.703, 75 ohm unbalanced
Framing G.751 or unframed
Interface BNC (75 ohm)
Line Coding HDB3
Bit Rate 34.368 Mbps +/- 20 ppm
Cable Lengths RG59 = 150m, UR202 = 180m

DTE Interface
Port HSSI per EIA612, EIA613
Interface 50-way AMP (SCSI II connector)
Bit Rate 34.099 Mbps (Line framed)
34.368 Mbps (Line unframed)

Configuration & Management
Type Menu Driven
Access System console, Telnet, SNMP
Interface V.24, Ethernet 10 BaseT via RJ45
Security Access by 2-level password
Clock Modes Internal, Loop

Status LED & Diagnostics
Loop backs NI Local loop, NI Remote loop, DTE loop, DTE External loop
Statistics Per G.821, 15 min, 24 hour totals
Major Alarm LED LOS, LOF, SQ (E3 port)
Minor Alarm LED AIS, RAI (E3 port)
Data LEDs DTE Tx Data, DTE Rx Data, DTE Fault (HSSI port)
Test LED Test in progress LED, test configured via diagnostics menu

Power Supply
AC Mains 100 - 250VAC, 50 - 400Hz, 50mA IEC Connector
-48VDC -36 to -72VDC, 200 - 100mA

Packaging
Type 1U 19 inch Rack mount
Dimensions 435 x 213 x 44 mm (W x D x H)

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

Compliance & Approvals
Performance G703, G751, G823, CTR24, BABT#NS/4043/I/V/606274, NTR6
Safety EN41003, EN60950
EMC EN55022, EN50082
Statistics G.821, AT&T54016:15min, 24hour totals
Management RFC1213 (MIB2), RFC1495 (Telnet), RFC1157 (SNMP), RFC1407 (DS3/E3)
MetroDTE MIB (HSSI), RFC1215 (Traps)
Part Number
Product 100-250 AC Mains -48 DC Power
80-05-015 80-21-015
LM1100 SNMP Enabler 14-02-139 14-02-139

Networking The World Since 1989