6 — LP MDU, MDU, and modular ONT hardware functional blocks
6-18 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Connections
The FPGA supports the service unit FPGA configuration interface and provides two
GMIIs to the GE multilayer switch. The GE multilayer switch provides a data path
between the optical functional block and the three service units. The switch also
supports a peripheral component interconnect (PCI) bus to the OBC function.
The OBC provides the interfaces as described in Table 6-17.
Table 6-17 OBC interfaces
The M-300-A modular ONT provides a minimum of 16 GEM port IDs, including the
following:
• 12 IDs for 12 VDSL2 ports
• 1 ID for ONT management control interface (OMCI)
• 1 IDs for VoIP
• 1 ID for remote debug
• 1 ID for inband video (multicast)
The modular ONT supports a minimum of 16 allocation IDs, including the
following:
• 12 IDs for 12 VDSL2 ports
• 1 ID for OMCI
• 1 ID each for VoIP, RTP signaling, and control
Time calibration
The modular ONT derives accurate time calibration from a series of network time
protocol (NTP) servers. The ONT communicates with the NTP servers using the
NTP protocol and authenticates NTP servers with a provisionable security key.
If NTP is not used, the ONT receives time calibration from the OLT.
Interface Description
Micro wire This interface is used to connect to the remote inventories and
temperature sensors on the modular ONT motherboard and service
units.
PCI This interface is used to connect the OBC to the GE multilayer switch.
Local bus This interface is used to connect to the modular ONT subsystems for
control, provisioning, and status monitoring activities.
Craft port This interface is used by the operating personnel to access the
modular ONT for administration and maintenance purposes.
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