From 58172f4ff08e36730cf8ffe8f9be2443e014ded3 Mon Sep 17 00:00:00 2001 From: Mark Spencer Date: Sun, 17 Apr 2005 17:39:14 +0000 Subject: [PATCH] Note that big time changes can cause issues (bug #4020) git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@5482 65c4cc65-6c06-0410-ace0-fbb531ad65f3 --- README | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/README b/README index 24a11f4b6b..71925de702 100755 --- a/README +++ b/README @@ -162,6 +162,23 @@ parameters. For example, the line "channel => 25-47" creates objects for the channels 25 through 47 of the card, obtaining the settings from the variables specified above. +* SPECIAL NOTE ON TIME + + Those using SIP phones should be aware the Asterisk is sensitive to large +jumps in time. Those who live in areas that are on Daylight Savings Time (or +equivalent) should set their system and hardware clocks to use UTC in order +to avoid any possible jumps in system time. There should be no noticeable +effects to the user, as you should still set your system to use the local +offset from UTC. + + Even for those who don't live in DST zones, this issue may manifest itself +if the administrator makes large manual time adjustments. Thus, it is good +practice to keep the time on your Asterisk server synced to a reliable +source, such as an NTP server. + + Also note that this issue is separate from the clocking of TDM channels, and +is known to at least affect SIP registrations. + * MORE INFORMATION See the doc directory for more documentation.