FM4800 - X.21 Over E2 8.448Mbps G.703

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The Metrodata FM4800 DSU is used to interface high performance DTE equipment such as bridges or routers to 8.448Mbps E2 services. The DTE equipment presents an X.21 interface. The FM4800 can be used at either end of the Wide Area link. Error conditions and usage statistics are gathered and stored by the FM4800. Unit set-up is done via a comprehensive menu system which is accessed via a local or remote terminal.

E2 G.703 to X.21 Converter : FM4800 View

The optional Metrodata LM1100 SNMP Enabler permits management via a LAN using an SNMP system.

Product Features

High Spec E2 G.703 8.448Mbps interface
X.21 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

Application Diagram

E2 G.703 to X.21 Converter : FM4800 Application diagram

Specifications

Line E2 Interface

Port	G.703, 75 ohm unbalanced
Interface	BNC (75 ohm)
Framing	Unframed
Line Coding	HDB3
Bit Rate	8.448 Mbps +/- 30 ppm
Cable Lengths	E2 BNC RG59 = 300m E2 BNC UR202 = 370m

DTE Interface

Port	X.21
Interface	X.21: ISO4903 15-way female D-type
Bit Rate	8.448 Mbps

Configuration & Management

Type	Menu Driven
Access	System console, Telnet, SNMP
Interface	V.24, Ethernet 10BaseT via RJ45
Security	Access by 2-level password
System	Non-volatile set-up
Clock Modes	Internal, DTE mode (CCITT cct 113), E2 loop

Status LED & Diagnostics

Loopbacks	NI Local loop, NI Remote loop, DTE loop
Statistics	Per G.821, 15min, 24 hour totals
Major Alarms	LOS
Minor Alarms	AIS
Data	DTE Tx Data, DTE Rx Data, DTE Fault
Test	Test via menu, Test LED on front panel
BERT	215-1 PRBS

Power Supply

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

Packaging

Type	U 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	BS6328, G703, G823, BABT # NS /4043/I/P/603917
Safety	EN41003, EN60950
EMC	EN55022, EN50082
Statistics	G.821, AT&T54016:15 min, 24hr totals
Management	RFC1213 (MIB II), RFC1495 (Telnet), RFC1157 (SNMP), RFC1406 (DS1/E1), Metro MIB (DSU), RFC1215 (Traps)

Ordering Information

Part	AC Mains: 100 - 250 VAC	DC Power: -48 VDC
FM4800 E2 - X.21	80-05-013	80-21-013
LM1100 SNMP Enabler	14-02-139	14-02-139

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