10 — ONT technical specifications
10-14 July 2008 Alcatel-Lucent 7342 ISAM FTTU ONT R04.05.06
ONT Product Information Manual Edition 01 3FE 51892 AAAA TCZZA
Note
(1)
The upstream derived clock that is provided by the P-OLT is tied to the BIT clock and must be
traceable to a network timing reference. The derived clock is used for differential clock recovery
and for timing the upstream PWE3 packet streams in the absence of a valid TDM recovery clock.
10.8 RF video interface specifications
The following sections provides design guidelines for coaxial connectivity,
configuration recommendations, and information based on the RF video receiver
types used by various Alcatel-Lucent ONTs and MDUs.
Coaxial connectivity in the home and design guidelines
There are numerous criteria that effect RF video overlay. Figure 10-1 shows an
example of the factors affecting RF video overlay design and deployment.
Standard 75 Ω coaxial cable can be used, including: RG-59 or RG-6 coaxial cable.
E1 standards ITU-T Rec. G.703, G.704, G.706, G.732, G.823
Structured (fractional) and unstructured E1
Synchronization CES DS1/E1 Upstream: A 16.384 MHz local oscillator or a derived clock
(1)
from the GPON that is provided by the P-OLT.
Downstream: Either a16.384 MHz adaptive clock received from
the PWE3 packet stream or a differential clock recovered from
the PWE3 packet stream.
Gigabit
Ethernet
A Gigabit Ethernet transmit reference clock of 125 MHz as per
IEEE 802.3.
Item Specification
(2 of 2)
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, affect service delivery, and void any component or system
warranties.
Note 1 — See the 7342 ISAM FTTU Product Information Manual for
more information about the RF video service.
Note 2 — Alcatel-Lucent only guarantees ONT RF video output
levels. Coaxial cable and splitter information in the following sections
are only provided as guidelines. Refer to the coaxial and splitter
vendor documentation for more information.
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