Chapter 1 Introduction
1.7.9 FRM220-E1/T1 In-band managed G.703 E1/T1(DS1) Fiber Modem
The FRM220-E1/T1 is a fiber modem transport for G.703 E1 or T1(DS1) transmission. The BNC model (E1
only) provides unbalanced 75 Ohm coaxial connections while the RJ-45 model provides balanced 100/120 Ohm
connections over twisted pair wiring. When the FRM220-E1/T1 card is placed in the FRM220 rack with in-band
management, the card status, type, version, fiber link status, E1 or T1 link status and alarms can all be displayed.
Configuration is also available to enable or disable the port, reset the port, do far end fault setting, and initiate local
or far end loop-back tests. When configured in G.703 E1 mode, this model also supports fractional E1 (G.704) as
well as remote connection to FRM220-Data (V.35, RS-530/449, X.21) fiber modem for either unframed (2048Kbps)
or fractional (nx64kbps where n=1 to 31) transmissions.
Features
• Network Management via Terminal or SNMP in FRM220 chassis
• T1/E1 RJ-45 (USOC RJ-48C) or Coax (BNC) Fiber Modem
• Supports AMI or B8ZS/HDB3 line codes
• Unframed (transparent clear channel) mode
• N x 64K (fractional E1) mode
• Supports point to point (CPE) solution with FRM220-DATA
• User selectable Loop back tests
• Far End Fault (FEF) detection
Specifications
Ports Connector 1x9 (SC, ST, FC) or SFP LC
Optical Interface
Cable type MM 62.2/125µm, 50/125µm.
SM 9/125µm
Cable length MM 2km, SM 15/30/50/80/120km,WDM 20/40/60/80km
Wavelength MM 1310nm, SM 1310, 1550nm, WDM 1310Tx/1550Rx(type A),1550Tx/1310Rx(type B)
Data rate 36.864Mbps
Electrical Interface
Connector RJ45 E1-120ohm, T1-100ohm, BNC E1-75ohm
Data rate E1: 2.048Mpbs, T1:1.544Mbps
Line Code E1 HDB3/AMI, T1 B8ZS/AMI
Cable type Cat.3 or higher Twisted-Pair cable
Standards E1 ITU-T G.703, G.704, G.706, G.732, G.823
T1 ITU-T G.703, G.704, AT&T, TR-62411, ANSI T1.403
LEDs Power, FX-Link, E1/T1 SIG, Test, SYN, RD, TD, AIS
Power DC In 12V
Consumption < 5W
Dimensions 155 x 88 x 23mm (D x W x H)mm
Weight 120g
Temperature -10~60°C (Operating) ,-20~70°C (Storage)
Humidity 10~95% non-condensing
Certification CE, FCC, LVD, RoHS
MTBF 65,000 h (25°C)
This product includes the following models:
• E1/T1R (RJ-45 electrical plus fixed optical)
• E1T1RS (RJ-45 electrical plus SFP)
• E1B (Dual BNC plus fixed optical)
• E1BS (Dual BNC plus SFP)
E1/T1 is a stand-alone ma
G.703 E1/DS1(T1) Fiber Opt
Modem that can carry E1/T1
fiber transparently or with framin
One model is designed with R
while another model supports
coaxial BNC connections.
nageable
ical
over
g.
J-45,
E1 via
18
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