Specifications

Chapter 1. Introduction FOMi-E1/T1 Installation & Operation Manual
1-6 Technical Specifications
1.4 Technical Specifications
Electrical Interface
The electrical interface meets requirements of ITU G.703, G.921 and
G.956 standards for E1 and T1.
Transmission rates
2.048 Mbps for E1 standards
1.544 Mbps for T1 standards
Interface
User selectable by means of internal switches:
− 75Ω unbalanced E1
− 120Ω balanced for E1
− 100Ω balanced for T1
Zero suppression
E1: HDB3
T1:B8ZS
Connectors
RJ-45 (RJ-48C) for T1 or E1 balanced
interfaces
Two BNC connectors for E1 unbalanced
interface.
Power
115V or 230 VAC 50/60 Hz, 20W max.
-48 VDC -36 to -72 VDC 20W max.
Optical Interface
Operating Wavelength – 850 nm (multimode)
– 1300 nm (single-mode)
– 1550 nm (single-mode)
Connectors
ST or FC-PC or SC
Range
Table 1-1 Power Coupled into Fiber and Approximate Application Range
Fiber Type 850 nm 1300 nm 1300 nm laser 1550 nm laser
dBm km dBm km dBm km dBm km
9/125 - - -18 45 -12 60 -12 100
62.5/125 -18 5 - - - - - -
Receiver sensitivity
For BER: 10
-9
38 dBm at 850 nm
40 dBm at 1300 nm
40 dBm for laser 1300 nm
40 dBm for laser 1550 nm