Thanks
Oded
We ran
a simple test to test the last theory and found out that handset time is not
involved. Looks like SMSCs are the ones fixing the
timestamp.
Only
thing to find out next is whether the timestamp comes from originating SMSC or
gets written over at target SMSC.
Cheers,
Calvin
-Original Message-From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Oded
ArbelSent: Tuesday, May 21, 2002 6:53 PMTo: Calvin Boo;
[EMAIL PROTECTED]Subject: RE: SMS roaming
timestamp
When
roaming, the SMS is first routed to the home SMSC of the roaming user, and
then if apropriate is sent back to the mobile terminal of the foreign local
user. I'm not sure if the SMSC of the foreign local user is involved in the
process.
In the two local networks scenario, then its dependant on various
conditions - the most important of them is of course the technology used in
the involved networks : if the technologies differ, then both SMSCs are
involved, in addition to any sort of passthrough mechanism used to transfer
messages between the networks. if both networks use the same technology, then
it's the same situation as with sending an SMS to a foreign network. I guess
its also depends on theroaming
agreements between the
operators.
In any method, the time stampon
the SM is generated in the mobile of the user using the timestampfrom
the mobile terminal's internal clock. this may be set by the network itself
(some network technologies and mobiles can synchornise themself),but is
most often setby the user tothe not so correct time on her watch.
another interesting thing to note, is that the SM contains the time zone of
the time stamp, which in allhandsets that I've tested is always set to
GMT, no matter the location of the
mobile.
--Oded Arbelm-Wise Inc.[EMAIL PROTECTED](972)-67-340014(972)-9-9581711
(ext: 116)
::.."Everybody's a slave to
routine."-- Calvin and
Hobbes
-Original Message-From: Calvin Boo
[mailto:[EMAIL PROTECTED]]Sent: Tuesday, May 21, 2002
11:27 AMTo: [EMAIL PROTECTED]Subject: SMS roaming
timestamp
Appreciate
anyone who can help shed some enlightenment on the subject of SMS roaming
and timestamp.
Question:
1. If a user
travelling to a foreign country has roamed to another host network, and he
sends an SMS from his mobile to a local terminal in the host country, where
does the SMS get sent to first :
(a) the home
SMSC then routed to the host SMSC
(b) routed via
the host SMSC then fwd to home SMSC
(c) host SMSC
then directly to receiving terminal
2. What then is
the timestamp on the SMS arriving at the receiving terminal, if multiple
SMSCs are involved?
3. In a separate
scenario, if two users on different networks in the same country send each
other a message, I guess both network SMSCs will be involved in the routing
process. Who affixes the timestamp on the SMS? The
sender SMSC or does the receiver SMSC replace the timestamp of the SMS
received from sender SMSC.
Thanks a million
for the help.
Best
Regards,
Calvin BooSingapore
