Cisco Systems (Nasdaq: CSCO), the largest maker of equipment for computer networks, plans to buy Cariden Technologies Inc. for about $141 million, adding tools to manage Internet data traffic.

The deal is expected to close in the second quarter of Cisco’s 2013 fiscal year, the San Jose, California-based company said today in a statement.

Cisco also said it will pay a combination of cash and retention incentives.

Cariden is based in California.

The deal, the latest in a series of acquisitions made by Cisco in recent months, was announced Thursday.

“The Cariden acquisition reinforces Cisco’s commitment to offering service providers the technologies they need to optimize and monetize their networks, and ultimately grow their businesses,” said Surya Panditi, senior vice president and general managerfor Cisco’s Service Provider Networking Group.

“Given the widespread convergence of IP and optical networks, Cariden’s technology will help carriers more efficiently manage bandwidth, network traffic and intelligence,” Panditi added. “This acquisition signals the next phase in Cisco’s packet and optical convergence strategy and further strengthens our ability to lead this market transition in networking.”

Cariden’s gear for designing and operating telecommunications networks can help Cisco benefit from the surging volume of data that its customers must shuttle between servers, mobile phones, search engines and video websites. With the deal, Cisco gains tools to help wireless providers improve the speed and efficiency of their networks.

Cisco’s Rationale for Deal

In the announcement, Cisco said the deal supports its wide area network strategy.

“Cariden’s industry-leading capacity planning and management tools for IP/MPLS (Multi-Protocol Label Switching) networks, which have been deployed by many of the world’s leading fixed and mobile network operators, will be integrated into Cisco’s Service Provider Networking Group to enable multilayer modeling and optimization of optical transport and IP/MPLS networks. Cariden’s products and technology will advance Cisco’s nLight technology for IP and optical convergence. The acquisition also supports the company’s Open Network Environment (ONE) strategy by providing sophisticated wide area networking (WAN) orchestration capabilities. These capabilities will allow service providers to improve both the programmability of their networks and the utilization of existing network assets across the IP and optical transport layers.”

Cisco operates its largest campus outside its California headquarters in RTP.

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(Bloomberg contributed to this report.)