Results 1 to 8 of 8

Thread: mobile, push, sync, over-air -> I am confused

  1. #1
    fisch09 is offline Special Member
    Join Date
    Dec 2006
    Location
    Melbourne, VIC, Australia
    Posts
    120
    Rep Power
    8

    Question mobile, push, sync, over-air -> I am confused

    Hi all,

    Ok - I have a zimbra network edition 4.5.6 running and I have a iMate JasJar.

    basics:
    - Compared to IMAP I can get my calendar and address book onto the JasJar as well using zimbra mobile.

    questions:
    - how do I set this up? In Zimbra I tick the zimbra mobile box but what next?
    - how does "push" work? If I get an email it is automatically pushed onto my PDA? - I really don't get this bit........
    - does over-air means my PDA establishes an internet connection by GPRS, EDGE, WiFi or whatever

    Please be gentle with me - I've never owned a PDA and I do not like this devices but the Management does ....

    cheers
    Andre

  2. #2
    fisch09 is offline Special Member
    Join Date
    Dec 2006
    Location
    Melbourne, VIC, Australia
    Posts
    120
    Rep Power
    8

    Default push <-> poll

    Hi all,

    now I have active sync configured and it is working as expected.
    But still the PDA initiates the connection to sync - where is the "push" ???

    Kind regards
    Andre

  3. #3
    jjzhuang is offline Zimbra Employee
    Join Date
    Jan 2007
    Posts
    1,688
    Rep Power
    11

    Default

    Some devices support push. When you select how often to sync with server, if you see something like "always on" then that's the push mode. The mobile service carrier will also need to support push in the data plan in order for it to work well. Push works well in some carrier network while often broken in another. Thanks!

  4. #4
    mmorse's Avatar
    mmorse is offline Moderator
    Join Date
    May 2006
    Location
    USA
    Posts
    6,242
    Rep Power
    20

    Default

    Quote Originally Posted by fisch09 View Post
    - how does "push" work? If I get an email it is automatically pushed onto my PDA? - I really don't get this bit..
    Hey fish, about as simple of an explanation/breakdown of 'push' vs 'pull/sync' as I can make it:

    Pull/Sync:
    Normally e-mail access is "pull" based: at login and in intervals from the server it's stored on.
    For example, your thunderbird/outlook client would initiate a connection from your desktop to the server every x minutes to check for new mail.

    Push:
    New e-mail is instantly and actively transferred (pushed) as it arrives at the mail server to the email client.
    Push devices can still choose to make use of sync, they need to occasionally check your folder structure for deletes, moves, an outbox (if you don't send in realtime/we're off network for a bit) etc.

    (wikipedia) Extending this push to the last delivery step is what distinguishes push e-mail from traditional e-mail systems. The reason that pull is the usual method for the last stage of mail delivery is that while the server would normally be permanently connected to the network, the client is likely to only occasionally be connected.
    ie: If your desktop/laptop was off, and the server tried to initiate the connection, well obviously there's no device at the other end to receive it; hence why 'pull' is the standard.

    Push essentially =
    an 'instant' e-mail experience; new e-mails appear on the device as soon as they arrive, without the need for any user intervention/sync.
    But you can realistically set your sync interval to 1-5 minutes and survive just fine . Your lag time is essentially the time between sync; and you spend a little more time utilizing your phone's cpu/ram to update your mail.
    Often, so your not clogging the phone's resources, network bandwidth, server resources, etc -there are hard minimums to the value you can set for sync time (like one minute). So maybe you get that new email 60 seconds later.
    Last edited by mmorse; 07-23-2007 at 12:37 PM.

  5. #5
    fisch09 is offline Special Member
    Join Date
    Dec 2006
    Location
    Melbourne, VIC, Australia
    Posts
    120
    Rep Power
    8

    Default thanks for all you help

    Hi guys,

    thanks for all your help. Basically all I need is:
    - a device that supports "push" (is there any list around?)
    - a carrier that supports "push"
    - set "always on" in sync options on the device.

    that sounds pretty straight forward.

    Cheers
    Andre

  6. #6
    jjzhuang is offline Zimbra Employee
    Join Date
    Jan 2007
    Posts
    1,688
    Rep Power
    11

    Default

    That's pretty much the case. Regarding compatible device list, in theory a lot of devices can support push, including all WM5 and WM6 devices, Nokia MailForExchange, and VersaMail 3.5+ on Treo. But in reality the best push experience we see is on WM devices on CDMA network such as Verizon and Sprint. For example, Treo 700w (a WM5 device) using Verizon data service has few issues with push.

    Other clients such as MailForExchange over GSM network see a lot more push issues. The client can simply stop doing push after a while, and has to be manually brought back on track. Also GSM data service such as AT&T closes idle data connection on a regular basis (such as every 60 seconds), making push virtually useless.

    Of course we only have anecdotal information on carrier data service. In different regions and on different plans, the same data package can have completely different experience.

  7. #7
    mmorse's Avatar
    mmorse is offline Moderator
    Join Date
    May 2006
    Location
    USA
    Posts
    6,242
    Rep Power
    20

  8. #8
    zetty is offline New Member
    Join Date
    Nov 2009
    Posts
    4
    Rep Power
    5

    Default

    Please help..

    I am using a Nokia E52 but unable to send mail.
    The outbox folder does not sync to the device.

    Although I dont have an exchange server in place I use mail for exchange on the older devies like the E71 which works fine.

    The E52 has a new mail client that works exactly the same as MfE

    Any suggestions as to how I can fix this...?

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Hangs on "Loading" screen
    By gbr in forum General Questions
    Replies: 16
    Last Post: 06-19-2008, 01:01 PM
  2. Zimbra Mobile fails with Java Exception
    By JasonChase in forum Zimbra Mobile
    Replies: 7
    Last Post: 01-21-2008, 07:25 PM
  3. Mobile Sync Broken
    By strandtc in forum Zimbra Mobile
    Replies: 12
    Last Post: 03-30-2007, 08:27 AM
  4. Mobile Push, Windows Mobile 5.0
    By Keran in forum Zimbra Mobile
    Replies: 4
    Last Post: 03-13-2007, 06:19 PM
  5. Can't mobile sync meeting invitations in calendar
    By bted in forum Zimbra Mobile
    Replies: 3
    Last Post: 11-15-2006, 12:26 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •