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Model 2890/2891

T1/E1 to Fiber Modem

S.I. Tech Model 2890/2891 T1/E1 to Fiber Modem

S.I. Tech Model 2890/2891

Features:

T1 AMI or B8ZS, E1 AMI or HDB3
Provides clear channel capability
Status indicators and alarms for ease of use and maintenance
Multimode or single mode fiber interface options
Up to 10 Km at low cost
Optical link failure alarm build in

The S.I.Tech 2890/2891 Bit-Driver is designed to work with T1 or E1 systems. Model 2890/2891 is a T1 or E1 to fiber optic transmitter/receiver full duplex product implementing T1 or E1 protocol. Normal operating data is 1.544 Mbps. (E1 - 2.048 Mbps)

This fiber optic Bit-Driver product eliminates many disadvantages of metallic T1 and E1 signals, especially EMI/RFI, ground loops (electrical isolation with fiber), high attenuation (high signal loss), limiting distance between nodes of system, and potential lightning damage outdoors between buildings.

S.I.Tech Model 2890/2891 is a standalone or rack mount product allowing easy change from T1 or E1 to fiber. Simply connect T1 or E1 cable to model 2890/2891 input/output port. Model 2890/2891 comes with power supply and status indicators.

Specifications

Operating Mode:	Synchronous, half/full duplex T1 - 1.54 Mbps E1 - 2.048 Mbps
Input/Output Interface:	T1, RJ48C 100 Ω Twisted Pair E1, BNC 75 Ω Coax or E1, RJ48C 120 Ω Twisted Pair
Transmission Line Interface:	2 ST fiber optic receptacles
Connector Options:	SC, FC, and SMA
Transmission Distance:	6600 ft. (2km)
Distance Options:	5km, 10km, or 20km
Transmitter Output Power:	820nm or 1300nm
Minimum Sensitivity:	3 Microwatts @ 820 nanometers
Bit Error Rate:	10^-9
Operating Temperature:	0°C to 50°C
Metal Enclosure:	7.5" x 7" x 1.75" - 1U (19 x 17.8 x 4.4 cm)
1U Rack Mounting Option:	17.0"W x 1.7"H x 7.5"D (43.2 x 4.3 x 19.0 cm)
Weight:	2 lb.(1.0 kg) / Rack 5 lb.(2.30kg)
Input Power:	110 VAC, 50 Hz, 5W
Power Options:	2890/2891V (230 VAC) 2890-48/2891-48 (-48 VDC)
Card Version:	2390/2391 (Euro Card Size)

Operating Distance for Fiber Optic Cable

S.I. Tech Model 2890/2891 Diagram

Female RJ48C I/O Connections

S.I. Tech Model 2890/2891 Diagram