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The Metrodata FM4900 DSU is used to interface high performance DTE equipment such as bridges or routers to 34.368Mbps E3 services.
Front: FM4900 E3 to HSSI Converter
Rear: FM4900 E3 to HSSI Converter
The DTE equipment presents an HSSI interface. FM4900s are used in pairs with one unit at either end of the Wide Area link. Error conditions and usage statistics are gathered and stored by the FM4900. Unit set-up is done via a comprehensive menu system which is accessed via a local or remote terminal.
The optional Metrodata LM1100 SNMP Enabler permits management via a LAN using an SNMP system.
- High Spec E3 G.703 34.368Mbps interface
- HSSI Data port
- External Alarm relay port
- Remote configuration and testing of units across the network
- Comprehensive performance monitoring of both device and line
- Optional SNMP management
- Optional -48 volt DC supply
- Built to European Standards
| 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 |
E3 BNC RG59 = 150m |
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E3 BNC UR202 = 180m |
{sbdnicertable tableid=dataset}
| DTE Interface |
| Port |
HSSI per EIA612, EIA613 |
| Interface |
50-way AMP (SCSI II connector) |
| Bit Rate |
34.099 Mbps (Line framed) |
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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 & Diagnostocs |
| Loopbacks |
NI Local loop, NI Remote loop, DTE loop, DTE External loop |
| Statistics |
Per G.821, 15min, 24 hour totals |
| Major Alarms |
LOS, LOF, SQ |
| Minor Alarms |
AIS, RAI |
| Data |
DTE Tx Data, DTE Rx Data, DTE Fault |
| Test |
Test via menu, Test LED on front panel |
| Power Supply |
| AC Mains |
100-250VAC, 50-400Hz, 50mA IEC Connector |
| -48VDC |
-36 to -72VDC, 200-100mA |
| Packaging |
| Type |
1U 19inch Rackmount |
| 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 (MIBII), RFC1495 (Telnet), RFC1157 (SNMP), RFC1406 (DS1/E1), Metro MIB (DSU), RFC1215 (Traps) |
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Part Number |
| Product |
100-250 AC Mains |
-48 DC Power |
| FM4900 E3 - HSSI |
80-05-015 |
80-21-015 |
| LM1100 SNMP Enabler |
14-02-139 |
14-02-139 |
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