Table Of Contents
Dual Optical S-4.1 Module, S4.1-2-LC
10.1 Module Description
10.1.1 Power Consumption
10.2 External Interface
10.2.1 Connector Type
10.2.2 Compliance
10.2.3 Optical Power Budget S4.1-2-LC Two-Fibre
Dual Optical S-4.1 Module, S4.1-2-LC
10.1 Module Description
The module contains two optical STM-4 interfaces that meets the S-4.1 specification in ITU-T G.957. The physical connector is a LC connector.The module only supports TDM traffic.
10.1.1 Power Consumption
9,5 W.
10.2 External Interface
The interface ia an optical STM-4 short haul interface, according to clause 5 ITU-T G.957 The definitions of optical parameters and reference points S and R refer to ITU-T G.957. Reference point S means transmit direction while R is the receive direction of the fibre. The following descriptions refer to both Single Mode fibre and Multi Mode fibre.
10.2.1 Connector Type
The physical connector is a LC connector
Figure 10-1 Dual Optical S-4.1 Module, S4.1-2-LC.
10.2.2 Compliance
Table 10-1 Optical Interface Compliance
Standard
|
Comment
|
ITU-T G.652
|
Single Mode Fibre specification 10/125
|
ITU-T G.651
|
Multi Mode Fibre specification 50/125 µm
|
IEC 793-2
|
Multi Mode Fibre specification 62.5/125 µm
|
ITU-T G.707
|
Optical line signal
|
ITU-T G.783
|
RX pull-in and hold range
|
ITU-T G.813
|
Optical output jitter
|
ITU-T G.825
|
Optical input jitter
|
ITU-T G.957
|
Optical spectrum,
Optical output power,
Optical eye diagram,
Optical extinction ratio.
|
10.2.3 Optical Power Budget S4.1-2-LC Two-Fibre
Table 10-2 Optical Power Budget STM-4 S4.1 SH and LH
Parameter
|
Short-Haul
|
|
|
Types of fibre:
|
ITU-T Rec. G.652 SM
|
10/125
|
µm
|
ITU-T Rec. G.651 MM
|
50/125
|
IEC 739-2 MM
|
62.5/125
|
Modulation rate on optical line
|
622 080
|
kbit/s
|
Wavelength range
|
1274 - 1356
|
nm
|
Transmitter at reference point S
|
Source type
|
MLM
|
|
Spectral characteristics (max. RMS width)
|
2.5
|
nm
|
Mean launched power (max.)
|
-8
|
dBm
|
Mean launched power (min.)
|
-15
|
dBm
|
Min. extinction ratio
|
8.2
|
dB
|
Optical path between S and R
|
Attenuation range
|
0 - 12
|
dB
|
Max. tolerable dispersion
|
200
|
ps/nm (SM Fibre)
|
Min. optical return loss
|
NA
|
|
Max. discrete reflectance between S and R
|
NA
|
|
Receiver at reference point R
|
Min. sensitivity (BER < 1 in 1010)
|
-28
|
dBm
|
Min. overload
|
-8
|
dBm
|
Max. optical path penalty
|
1
|
dB
|
Max. reflectance at R
|
NA
|
|
