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ADSL2+ Service
Introduction
ADSL2+ is a new generation of ADSL broadband service access
technology. It doubles the bandwidth used to carry downstream
data.
Functions
ADSL2+ provides 24 Mbps downstream and 1 Mbps upstream.
ADSL2+ uses high frequency up to 2.2 MHz. ADSL2+ applies to
transmission with asymmetric rate. It delivers speed up to 20
times faster than the typical broadband services over copper line
networks. ZXMSG 5200 provides ADSL 2+ service.
Frequency
Figure 14 shows ADSL2+ frequency channel allocation.
Allocation
F
I G U R E
Features
ADSL2+ features are as follows:
Operation
ADSL2+ supports three operation modes.
Modes
1 4 – A D S L 2 + F
R E Q U E N C Y
P ( f )
Upstream Channel
POTS
4kHz
Operation modes
Higher rate
Longer transmission distance
Lower power consumption
Stable running and frequency compatibility
Line diagnosis function
Better networking
annex A:
This mode uses ADSL over POTS, with POTS service on same
lines pair.
annex B:
This mode uses ADSL over ISDN, with ISDN service on same
lines pair.
annex C:
This ADSL service works with TCM-ISDN interference.
Confidential and Proprietary Information of ZTE CORPORATION
Chapter 3 Service Functions
C
A
H A N N E L
L L O C A T I O N
Downstream Channel
0.14 MHz
f
2.2 MHz
35
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