11 — B-8102-A and B-8112-A unit data sheet
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02 November 2013 11-15
3FE 55873 AAAA TCZZA Edition 01
ONT Product Information Guide
The CES IWF packetizes DS1 or E1 traffic received at the RJ-48C port before it is
multiplexed with other Ethernet Layer 2 data packets for transport upstream on the
GPON. MEF-8 is the packet payload format used. The packetization is removed
before downstream DS1 or E1 traffic from the GPON is sent to the DS1 or E1 lines
at the subscriber side.
Clocking, network synchronization, and time calibration for CES
All business ONTs can use one of two clocking sources for CES: a derived GPON
clock or a local oscillator. When the system clock for CES is derived from the
GPON, the upstream P-OLT locks to the BIT clock and supplies the ONT with an
Ethernet clock that is traceable to a network timing reference. The supplied Ethernet
clock is used for differential clock recovery and for timing the upstream pseudo-wire
MEF-8 packet streams in the absence of a valid TDM recovery clock. The local
oscillator is only used if adaptive mode is selected.
The downstream TDM streams may be timed from one of two clocking sources: an
adaptive clock received from the MEF-8 packet stream, or a differential clock
recovered from the MEF-8 packet stream.
The business ONT calibrates its time of day from a series of network time protocol
(NTP) servers. The ONT communicates with the NTP servers using the NTP
protocol and authenticate NTP servers with a provisionable security key. During a
loss of service (LOS) state on the GPON interface, a minimum 32 ppm clock is
maintained.
11.10 B-8102-A and B-8112-A special considerations
B-8102-A and B-8112-A ONT software considerations and limitations
Table 11-11 lists the considerations and limitations for the B-8102-A and B-8112-A
business ONT.
Table 11-11 B-8102-A and B-8112-A business ONT considerations and limitations
Considerations and limitations
Do not submerge business ONTs. The ONT cannot withstand water submersion caused by flooding.
Equipment damage will occur
The B-0404-A E1 interface supports standard 120 Ω termination via an RJ-48C. Customers that
require a 75 Ω termination need an external adapter
FEC is not supported
Line loopbacks are not supported
The ONT does not support VLAN translation and VLAN pass-through traffic that uses the same p-bit
across the same UNI or downstream p-bit translation when services are configured in VLAN
pass-through mode
The ONT cannot forward CCM packets to the edge router
The ONT does not support RIPv2 or SAPv1 packets on an unicast VLAN that is not the multicast GEM
port
The ONT cannot perform subscriber join IGMP CAC check when LT-to-ONT signalling is disabled
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