| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 2265.1 | Curious! | VNABRW::EHRLICH_K | Never met a Lady like her before! | Fri Sep 13 1996 10:25 | 21 |
| 2265.2 | No V2.4 systems here | CHEFS::HULINI | | Fri Sep 13 1996 14:45 | 16 |
| 2265.3 | Time Offset in MGT MM SOC seems to be the problem | COPCLU::ELIN | Elin Christensen @DMO, DTN 857-2406 | Wed Feb 26 1997 18:47 | 66 |
| 2265.4 | Partial Answer | IOSG::PYE | Graham - ALL-IN-1 Sorcerer's Apprentice | Wed Feb 26 1997 19:41 | 18 |
| 2265.5 | Side effects if Time Offset is set to 0 ? | COPCLU::ELIN | Elin Christensen @DMO, DTN 857-2406 | Thu Feb 27 1997 18:29 | 15 |
|
Does the Time Offset only get used when you send/receive mail between
ALL-IN-1 systems on the same network (via Message Router) ??
If that is the case, I guess that we won't see side effects on Tele
Danmark, if we set Time Offset to 0, as all Tele Danmark's ALL-IN-1
systems are in the same timezone. ????
Or does ALL-IN-1's Time Offset also get used when mail is sent via
different gateways, X.400, Internet, (and whatever Lotus Notes and
Exchange needs in order to communicate with ALL-IN-1), etc.?
Elin
|
| 2265.6 | Why time offsets | ZUR01::ASHG | Grahame Ash @RLE | Thu Feb 27 1997 18:44 | 33 |
| This note, and other time-offset ones probably, desperately needs one of
Scott's in-depth "This Is How It Works" descriptions!
ALL-IN-1 always works in Local Time. As a User Agent, it has to know the time
that the users have on their clocks. But in the mail world, there are 24 (ish)
different times as I write this, so mail tries to establish a way of making
sense of this.
Message Router has the concept of Network Time - all Message Routers should be
set to the same global value (the same offset from GMT). Many networks set
their MRs to run at GMT.
So ALL-IN-1 (and other UAs) need to know the difference between Local Time and
Network Time. Then, when ALL-IN-1 sends a message to MR, if it knows that Local
Time is 1 hour ahead of Network Time (imagine ALL-IN-1 in Denmark, but Network
Time = GMT), then it will subtract 1 hour from the times on the message.
When this message gets to the US (say), the times are still at GMT. But
ALL-IN-1 there knows that it's 5 hours behind GMT, so it subtracts 5 hours
from the time on the message. The end result is that the recipient sees what
time the message was sent, expressed in the recipient's local time.
The same rules apply if the message leaves MR via a gateway e.g. XMR or MRX to
get into X.400. Both of these Gateways need to know what the MR time
represents i.e. they need to know if MR is using GMT as its Network Time - if
it's not, they need to know the offset from GMT (This is because X.400
timestamps are GMT-based).
So time-offsets are required every time a message leaves or rejoins the "user
world", and possibly again if it changes backbone environments which have
different rules for what Network Time is.
grahame
|
| 2265.7 | and the answers | ZUR01::ASHG | Grahame Ash @RLE | Thu Feb 27 1997 18:50 | 20 |
| So what I should have said was:
Does the Time Offset only get used when you send/receive mail between
ALL-IN-1 systems on the same network (via Message Router) ??
Yes, if you mean the ALL-IN-1 offset
If that is the case, I guess that we won't see side effects on Tele
Danmark, if we set Time Offset to 0, as all Tele Danmark's ALL-IN-1
systems are in the same timezone. ????
You must make sure that each ALL-IN-1 system has the same offset.
Or does ALL-IN-1's Time Offset also get used when mail is sent via
different gateways, X.400, Internet, (and whatever Lotus Notes and
Exchange needs in order to communicate with ALL-IN-1), etc.?
No, it doesn't - see -.1
grahame
|