Investopedia: Service Providers Disconnect Juniper's Momentum

While tech stocks often trade in tandem when there's news from the major players, not all networking is the same. In other words, the problems that Juniper Networks (NYSE:JNPR) is now facing are not necessarily directly translatable to Cisco Systems (Nasdaq:CSCO) or smaller vendors like F5 Networks (Nasdaq:FFIV) and Riverbed Technology (Nasdaq:RVBD). For Juniper, as for Alcatel-Lucent (NYSE:ALU) and Acme Packet (Nasdaq:APKT), the story today is about weak spending in North America from the large service providers. (For more, see Earning Forecasts: A Primer.)

A Disappointing End to the Year  
Juniper announced January 9, 2012, that fourth quarter results were not going to meet Wall Street expectations. Instead of the average estimates of $1.19 billion in revenue and 34 cents in earnings, Juniper announced that results were going to be on the order of $1.11 billion to $1.12 billion and 26 cents to 28 cents.

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http://stocks.investopedia.com/stock-analysis/2012/Service-Providers-Disconnect-Junipers-Momentum-JNPR-CSCO-FFIV-HPQ-ALU0111.aspx