This free of charge Spirent Application Note tells you how.

The International Earth Rotation and Reference Systems Service (IERS), the organisation which monitors and manages the difference between the atomic Universal Coordinated Time (UTC) and Earth-rotation-based time, UT1, has decided that a further leap-second will be inserted on 30th June 2012 at 23 hours, 59 minutes and 59 seconds. This insertion - the first since 2008 - is intended to compensate for the accumulated difference between UTC and UT1, and the fact that the Earth’s rotation is currently running slower than UTC. GNSS systems use time references based on atomic clocks linked to UTC, so it is beneficial to keep these time systems aligned with Earth-rotation-based time.

By Gail Ferreira, Product Marketing Manager at Crossbeam, and Chris Chapman, Technical Marketing Engineer at Spirent

Crossbeam and Spirent recently partnered with EANTC, an internationally recognized test center, and Heavy Reading analyst Gabriel Brown to define and emulate the most realistic real-world conditions within mobile networks, and evaluate the performance of Crossbeam X80-S as a network security device under these demanding conditions.

I was recently talking to a new acquaintance and found that we had followed similar career paths up to a point. We had both spent some time developing mass-market consumer premises equipment, he in the cable-modem industry and myself in the DSL market. While I eventually moved to the dark side (Marketing), he now manages an R&D group for a cellular device manufacturer.

Somehow or other we started talking about the stresses of “launch day”. When you develop mass-market products, an error on your part doesn’t result in someone getting angry at you; it results in thousands or tens of thousands getting angry. On “launch day”, you know you might briefly step away from your desk and come back to dozens of emails and voice mails that essentially say, “Forget about sleeping for a few days or weeks.”