Cisco Headend Digital Broadband Delivery System Technical References
Operations Alert Bulletin
Cleaning Up SAM Services to Prevent
Set-Tops From Booting Into Analog-Only
Mode
Cleaning Up SAM Services to Prevent
Set-Tops From Booting Into Analog-Only
Mode
Overview
Background
While a set-top is booting, it must read and process the system's Service Application
Manager (SAM) data in order to build its channel map. The SAM is a table that
identifies available services and associated applications. The more SAM data the set-
top must process, the longer the set-top takes to display video.
In some extreme cases, when the set-top has to process a very large amount of SAM
In some extreme cases, when the set-top has to process a very large amount of SAM
data, the set-top may actually boot into analog-only mode if the set-top power
button is pressed before the clock on the set-top appears. This happens when it takes
longer than 2 minutes from the time the power button is pressed to process the SAM
table.
Purpose
This document provides system operators with a few guidelines and procedures that
they can follow to help prevent set-tops from booting into analog-only mode.
Scope
This document pertains only to sites that run theCisco Resident Application (SARA).
This bulletin does not pertain to sites that run the Aptiv Digital (Passport), the Time
Warner Mystro (MDN/ODN), or the Comcast i-Guide™ Resident Applications.
Audience
This document is intended for system operators of Cisco’s Digital Broadband
Delivery System (DBDS). Cisco engineers who help system operators troubleshoot
and maintain their systems will also find this document useful.