Alcatel-Lucent 7330 - DS1;E1 Interface Specifications; VDSL Termination Points; ITU-T Standards Supported

3 — ONT and MDU general and interface technical specifications
Alcatel-Lucent 7302 ISAM | 7330 ISAM FTTN | 7360 ISAM FX ONT R04.06.02 November 2013 3-11
3FE 55873 AAAA TCZZA Edition 01
ONT Product Information Guide
The High Pass Filter (HPF) blocks the POTS/ISDN signals towards the VTU, and
the Low Pass Filter (LPF) blocks the VDSL signal towards the Local Exchange
(VTU-O side) or telephone set (VTU-R side).
Figure 3-1 VDSL Termination Points
A bandplan is a partitioning of the frequency spectrum into non-overlapping
frequency bands, each of which is allocated for either upstream or downstream
transmission. ANSI and ETSI define a set of predefined VDSL BandPlan modes of
operation. The VDSL BandPlan shall be configurable on a per port basis. The
following bandplans are supported:
• bandPlanAnnexA998 17A, 30A
• bandPlanAnnexB998ADE 17a, 30a
• bandPlanAnnexB998E 17a, 30a
Table 3-5 describes ITU-T standards and related VDSL2 modes supported on the
MDUs.
Table 3-5 ITU-T standards supported
3.6 DS1/E1 interface specifications
The business ONT supports structured, unstructured, and fractional DS1 (100 Ω) or
E1 (120 Ω/75 Ω) services. An external adapter is required for 75 Ω. You cannot mix
DS1 and E1 services on the same ONT. You must configure both ports for either DS1
or E1 on the same ONT.
The CES subsystem encapsulates DS1 or E1 traffic received at the RJ-48C port using
MEF-8 packetization as Ethernet layer 2 for transport across the GPON. The CES
encapsulation is removed before DS1 or E1 traffic from the GPON is sent to the DS1
or E1 lines at the subscriber side.
Standard Description
G.993.2 VDSL2 over POTS operating above the POTS 25 kHz band with trellis
G.994.1 Handshake procedures for DSL transceivers
Downstream
Metallic
twisted pair
Synchronization
signals
OAM
Data
signals
Data
signals
POTS signals
to CO
POTS
splitter
POTS
splitter
POTS signals
to CPE
Upstream
VTU-O
VTU-R
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