3 — ONT and MDU general and interface technical specifications
3-22 March 2011 Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a
ONT Product Information Guide Edition 01 3FE 54199 AAAA TCZZA
ONU activation
The activation procedure is performed by the exchange of upstream and downstream
flags and Physical Layer Operations Administration and Maintenance (PLOAM)
standard messages defined for GPON, as follows:
1 The ONT receives the requested GPON operating parameters from the OLT.
2 The ONT adjusts it parameters accordingly.
3 The OLT system discovers the serial number of a new connected ONT.
4 The OLT system assigns an ID to the ONT.
5 The OLT system measures the round-trip delay of the ONT transmission.
6 The OLT system notifies the ONT of the equalization delay.
7 The ONT adjusts the transmission phase to the notified value.
In the normal operating state, all the transmissions can be used for monitoring the
phase of the arriving transmission. Based on the monitoring transmission phase
information, the equalization delay can be updated.
3.12 ONT optical budget
This section provides the optical budget for all of the ONTs. Observe the safety
requirements with ONTs, which are Class 1 laser products. Figure 3-5 shows the
Class 1 laser product warning label attached to the ONT.
Figure 3-5 Class 1 laser product warning label
Table 3-13 lists ONT optical budget information.
Table 3-13 ONT optical budget
Warning — Operating equipment outside of its tested and
documented performance characteristics and causing an optical
overload may cause damage to equipment components, such as APD
receivers.
This can affect service delivery, and void any component or system
warranties.
CLASS 1 LASER PRODUCT
18256
Item Detail Minimum Typical Maximum
Operating temperature Ambient See the data sheets for each device
(1 of 2)
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