PON Interface. Vers Summary. 1. Standards 2. Transmission specific 3. Physical layer 4. Laser safety ABBREVIATIONS REFERENCES

Transcription

1 PON Interface Vers Summary 1. Standards 2. Transmission specific cations 3. Physical layer 4. Laser safety ABBREVIATIONS REFERENCES

2 1. Standards PON interface comply with the following Recommendations ITU-T GPON G to ITU-T GPON G Transmission specific cations The interface operate over single fiber architecture, mainly on the ITU-T G.652 A and B type optical cable, but also on ITU-T G.652 D type. Duct and aerial sections can be mixed in the network. The bit rates downstream (2488,32Mbit/s), upstream (1244,16Mbit/s) of optical interfaces comply with the requirements of clause of ITU-T G (03/2003) Recommendations. Splitting ratio of 1:128 is supported according to ITU-T Recommendation G (02/2003) Chapter 12. The physical reach of the PON interfacee is minimum 20km. The differential fiber distance between two PON interfaces is minimum 20km. The offered PON interface support downstream security: AES conformity to clause 12.2 of ITU-T Rec. G (02/2004). The encryption could be switch on/off on the PON interface and the AES encryption is established per ONT basis 3. Physical layer The type of the PON interface is supporting 28 link budget according to ITU-T Rec. G Amendment 1. (02/2006), based on G-PON module for Class B Downstream direction: OLT transmitter (Old) Operating wavelength range: 1480 to 1500nm Line code: Scrambled NRZ 3.2 Upstream direction: OLT Receiver (Olu) Operating wavelength range: nm G-PON module for Class B+ of Romtelecom satisfy the minimum requirements according to G Amendment 1 (Industry Best Practice), Table.1/G Table 1/G Optical power levels for the 2.4 Gbit/s downstream,1.2 Gbit/s upstream system OLT: Items Mean launched power MIN Unit Single fiber OLT m +1.5

3 Mean launched power MAX Minimum sensitivity Minimum overload Downstream optical penalty ONT: Mean launched power MIN Mean launched power MAX Minimum sensitivity Minimum overload Upstream optical penalty m 5 m 28 m ONT m +0.5 m 5 m 27 m The G-PON module for Class B+ of Romtelecom support ODN loss budget class B+ according to G Amendment 1 (Industry Best Practice), Table 2/G Table 2/G Loss budgets for the G-PON system Items Minimum optical loss at 1490 nm Minimum optical loss at 1310 nm Maximum optical loss at 1490 nm Maximum optical loss at 1310 nm Unit Single fiber Bidirectional FEC function is implemented on PON interface according to ITU-T Recommendation G.984.3, Chapter Laser safety PON interface is in line in line with EN standard; Safety of Laser products An appropriate safety sign according to housings where laser beam exist. Standards ISO and ISO is used on equipment parts and

4 ABBREVIATIONS GPON ITU-T ISO Gigabit-capable Passive Optical Networks International Telecommunication Union, Telecommunication Standardization Sector International Organization for Standardization ( GPON ) OLT ( GPON ) Optical Line Terminal (GPON ) ONU ( GPON ) Optical Network Unit aka MDU, Multi-Dwelling Units or ( GPON ) Pizza-Box (GPON ) ONT PON ( GPON ) Optical Network Terminal aka SFU, Single Family Unit Passive Optical Network REFERENCES ITU-T G ITU-T G ITU-T G ITU-T G ITU-T G ITU-T G ITU-T G.652 EN ISO Gigabit-capable passive optical networks (GPON): General characteristics Gigabit-capable Passive Optical Networks (GPON): Physical Media Dependent (PMD) layer specification Gigabit-capable Passive Optical Networks (GPON): Transmission convergence layer specification Gigabit-capable Passive Optical Networks (GPON): ONT management and control interface specification Enhancement band for gigabit capable optical access networks Gigabit-capable Passive Optical Networks (GPON): Reach extension Characteristics of a single-mode optical fibre and cable Safety of Laser Products Package Graphical symbols -- Safety colours and safety signs -- Part 1: Design principles for product safety in workplaces and public areas

5 ISO Graphical symbols -- Safety colours and safety signs -- Part 2: Design principles for product safety labels