Alcatel-Lucent 5530 - Manual (Page 3)

Alcatel-Lucent 5530 Network Analyzer 3
With higher bit rates and triple-play
services, the performance required
from DSL lines is rising dramatically.
Lines are being operated closer to their
bit rate limit while real-time voice and
video services are requiring greater
line stability. As a result, you will need
to put the right tools and processes
in place to prevent escalating OPEX,
while keeping customers happy.
Service Provider Challenges and Needs
Music download
File sharing
Best effort
Surfing e-mail
Sporadic
asynchronous
20 Mb/s
5 Mb/s
Recommended line speed
1 Mb/s
HDTV
Videophones
Online gaming
Real time and
quality sensitive
VoIP
Real time
latency sensitive
Traffic characteristics
SDTV
Figure 1. More real-time and quality-sensitive services
Support more quality sensitive services
DSL technology has enabled you to deliver triple-play
services more cost effectively. Video and voice as well
as new multimedia services tend to become more
demanding in terms of bandwidth, latency and error
rate, making them more sensitive to the line quality.
Despite advances in DSL technology, DSL technology
does have its limits. A DSL line capable of supporting
High Speed Internet may be unable to support more
quality-sensitive services such as IPTV or VoIP. Prob-
lems may arise from the poor condition of the loop itself
(e.g., contact problems, crosstalk, interference, etc.) or
from service demands that exceed the loop’s capability.