If you are not yet familiar with bonding (ITU-T G.998.x standards), this is simply using two pairs of copper wire rather than a single pair in order to offer service providers the ability to increase data rates to existing subscribers or to reach longer distances to attract new subscribers. Explaining the whole concept requires much details, but let me just summarize a bit my take on testing the right way in a bonded DSL (digital subscriber line) environment.
By using the bonding approach, service providers can increase bandwidth and deliver on their promised services (i.e., HD IPTV), therefore increasing revenues with minimal investment, hence keeping costs low.
Traditionally, DSL technicians have been using test sets that connect up to a single copper pair to get a clear pass/fail indication of DSL performance. Once the physical layer has been validated, higher-layer testing, such as IPTV performance veriﬁcation, can take place over this single copper pair. In a bonded environment, traditional single-pair DSL and IPTV performance veriﬁcation comes with multiple inherent ﬂaws.
In short, utilizing a single-pair test set in a bonded environment will result in:
With ADSL2+ and VDSL2 bonding now available, service providers can turn to a bonded DSL test solution to properly validate the physical attributes and services running over this bonded circuit. A bonded DSL test solution can help overcome potential problems:
Therefore, testing the right way in a bonded DSL environment is the only way to ensure proper delivery of service to the end subscriber. If you would like to know more, you can read the full article, Bonding with Bonding, in OSP magazine.