3 — ONT and MDU general and interface technical specifications
3-2 March 2011 Alcatel-Lucent 7330/7302 ISAM FTTN R04.02.42a
ONT Product Information Guide Edition 01 3FE 54199 AAAA TCZZA
3.1 Overview
This chapter provides information about ONT and MDU technical specifications.
3.2 System and service capacity specifications
This section provides the ONT system and service capacity specifications. Service
descriptions, such as VoIP and flex services, are provided in the appropriate OLT
Product Information Manual.
P-OLT performance and distance
The P-OLT provides performance and distance capacity of 2.488 Gb/s downstream
and 1.244 Gb/s upstream, within a 18.6 mile (30 km) span with GLT2-x cards and
within 37.3 miles (60 km) span with the GLT4-A and GLT4-D cards. The PON reach
available depends on the optical budget supported by the LT card used, the PON
reach specified based on network deployments, and the loss of optical fiber,
connectors, and splitters, and so on. Extended PON deployment allows you to
configure each PON to provide a 20 km, 34 km, and a 40 km differential window for
ranging and ONT operation.
The optical link budget is defined by both loss and bandwidth characteristics. The
loss characteristic is the difference between the optical transmitter and optical
receiver for each direction, and is typically 28 dB. The bandwidth characteristic is
the maximum link distance parameter of each OLT and ONT transmitter
specification, and is limited by the smaller of the upstream and downstream values.
PON capacity
The number of ONTs on the PON affects the bandwidth available to each subscriber.
Table 3-1 lists the capacity of various components on the PON. Individual capacity
per device is listed in the data sheet for the device.
Table 3-1 Capacity for PON system elements
Capacity Maximum Notes
PON
Maximum number of IGMP channels
per PON
288 Only created on VLAN ports.
Maximum number of data UNI ports
per PON (total of all UNI types)
288 This is the total of all CES (CESUNUI and CESPW UNI), ENET, VoIP,
and VDSL2 UNIs.
VoIP UNIs are created automatically when the ONT is planned
with the VOIPALLOWED parameter set to enabled (YES in TL1).
Maximum number of CESUNI UNI
ports per PON
128
Maximum number of CES PW UNI
ports per PON
128
Maximum number of POTS ports per
PON
384 —
(1 of 2)
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