Cisco Unified SRST provides Cisco Unified Communications Manager with fallback support for Cisco Unified IP phones that are attached to a Cisco router on your local network. Cisco Unified SRST enables routers to provide call-handling support for Cisco Unified IP phones when they lose connection to remote primary, secondary, or tertiary Cisco Unified Communications Manager installations or when the WAN connection is down.
SRST Overview and Description: Official Cisco Video
Ok, I'll admit it. I like these short Cisco marketing videos as a pretty good way to introduce a new concept or product to the aspiring network or telephony engineer. I'm focusing intensely on SRST recently, so thought I'd cast a wide net with the series of SRST-related posts you will see soon on this blog.