High Quality Content by WIKIPEDIA articles! The Avaya Secure Router 4134 (or SR-4134) in telecommunications and computer networking technologies is a device manufactured by Avaya that combines the functions of WAN Routing, stateful firewall security, Ethernet switching, IP telephony, and Microsoft mediation into one device. The system is very energy efficient, and can save the owner as much as 40% on energy total cost of owenership according to third party test by the Tolly Group. In July 2011 it was integrated with the Silver Peak WAN optimization appliance to optimize the performance of enterprise voice, video, and unified communications (UC), to ensure that remote users have fast and reliable access to all centralized applications.