I am a systems administrator and have 2 Nokia phones, an E52 and an E55. These are phones I bought from Expansys so neither are carrier branded.
I have set these up to use Mail For Exchange with SBS 2003 and, although mail delivery works fine (although slowly), there are regular unknown connections every 15 mins or so moving large amounts of packet data back and forth (about 200kb up and 300kb down) regardless of which phone I use. These constant connections are ruining the battery life of both phones (the E55 is worse), neither can make it through the day without a charge.
I have been through the Nokia Administration Guide for Mail For Exchange:
and these forums. I came across this thread:
http://www.allaboutsymbian.com/forum//forum/thread/76116/
but as the phone's are not carrier branded then there are no pre-installed apps like the Orange Camera.
The carrier used to be Orange, but we move to Vodafone last week. It seems to have got worse with Vodafone.
Other potentially useful information: The router is a Vigour 2800g and the only firewall on site, the phones have both been reset and set up from scratch multiple times. We have a certificate that the phone does not like but you simply tell it to ignore it for subsequent connections.
I have a feeling it is either an issue with the certificate or with the automatic heartbeat connection alteration in the phone. To quote the Admin Guide:
There is one issue that can have a negative impact
on heartbeat interval (and battery life) that can�t be
overcome by Mail for Exchange, ISA, Exchange or firewall
settings.
The access point your operator has provided for general
web use (browsing, WAP, etc.) may not be optimized for
Direct Push. The operator may be dropping connections
after one minute, for example, when there is no data
being transferred. Direct Push relies on long connections
to the server with no data activity.
When disconnected this way and the user has selected
�Always on�, Mail for Exchange reconnects to the network.
This uses a relatively high amount of battery power.
However, the same carrier may offer multiple access
points. Make sure that your users have subscriptions to
an access point that allows long connections with no
data traffic, or recommend that they use polled (i.e. every
30 minutes) or manual synchronizing.
For all firewalls and network appliances, set the idle
session timeout to 30-45 minutes. This will ensure that
your clients get higher heartbeat intervals.
So, do you guys have any suggestions at all? This is driving me and the user absolutely crazy. I look after another 50 SBS servers all with mobile devices including other Symbian phones, Windows Mobile Phones, Blackberrys and iPhones and have never encountered a problem like it.
Help Please!