OK, I probably should post some more information. Here are my dsl-321b modem settings, which I use when going online via LAN cable between modem <--> notebook (and for that purpose, they work just fine):
ADSL Setup:PPPoE/PPPoA selected with correct user & password
PPPoE LLC
MTU : 1492
Idle Time Out : 0
VPI :      1
VCI :      32
LAN Setup:Modem IP Address :      192.168.0.1
Subnet Mask :      255.255.255.0
DHCP Server enabled with   
DHCP IP Address Range :  192.168.0.21    to   192.168.0.254
DHCP Lease Time :   60   (seconds)
DNS Setup:"Obtain DNS server address automatically" selected
Advanced ADSL:Modulation Type: Autosense
"Bitswap Enable" selected
Diagnostics:All tests passed (green)
Last but not least:Firmware Version:  DE_1.04   Hardware Version:  D1
So for option 2 (having the dcs-930l email photos everytime the motion sensors activate while the cam is connected via LAN cable directly to the modem), I used the above modem settings and I set the cam to:
Static IP Address: 192.168.0.2
Subnet Mask 255.255.255.0
Primary DNS "blank"
Secondary DNS "blank"
HTTP Port: 80
UPnP enabled
UPnP Port Forwarding disabled
Bonjour enabled (although I have no idea what this does  

 )
Dynamic DNS disabled
( dcs-930l Firmware version: 1.05)
I have also configured the email and motion detection part (correctly, I think) but when testing general email functionality, under status / device info, I can read: Can not connect to SMTP server.
Any ideas?  
