Can you run a workgroup switch off the 1140e PC port, and then connect 2 PC's to the phone through the switch?

Yes - download the opperator manual from net at
http://www.nd.gov/itd/files/services/voice/1140e-user-guide.pdf

You can use the mute feature to block 2 way speech

When your 10 computers are connected to the switch, just make sure your ethernet cable is plugged into the ethernet port. The computers should then have a internet connection

Are those 4 ports in different Vlan ?
If you connect your wireless access point to the 1st port are you able to access the internet through 2nd port or 3rd port ?
Are the ports 1-4 admin down ?

maybe u should set domain(no workgroup) on ur server and set your default gatway to server IP. but I'm not sure that works

Connect your modem/router to one switch's port. Connect your PC to the rest ports.

If you are running C6E or later firmware, then the following keypad sequence is used to reset all provisioning paramaters to a "factory default":
[*][*][7][3][6][3][9][MAC][#][#]
Where MAC corresponds to the MAC address of the IP Phone which can be found on a label on the back of the IP Phone.
Since a MAC address can contain the letters A-F, then letters A/B/C can be entered via the [2] key on the dialpad, and letters D/E/F can be entered via the [3] key.
For example, an IP Phone with MAC address 00:19:E1:E2:17:12 would be reset to "factory default" when the sequence **73639001931321712## is entered on the keypad.

Phone Line?

You need a cable or dsl modem to connect to the internet. From the modem you run an ethernet cable to the "broadband" or "Internet" port of your router.
Also make sure your lynksys is a router, not a switch


Hope this helps



Cor

1. Reset the phone by disconnecting and re-connecting power.
2. When the Nortel logo appears, press each of the four soft keys in sequence.
3. If no other configuration changes are required, press OK repeatedly until the “PC
Port? 1-ON 0-0FF” option appears.
4. Press 1 to enable the PC Port or 0 to disable the PC Port.
5. Select OK to confirm the change.
6. Restart the IP Phone.
When the IP Phone is restarted, the firmware sets the PC Port status accordingly

here you are...
This could be the problem with your signaling server , have you checked it ??
I think it is losing connectivity of T-Lan Network.

Sounds like you may need what is called a "Crossover Cable' connecting your router to your hub, or if either device has an uplink port, use it on one device to connect to normal port on other device. Here are instructions for making your own cables: http://www.lanshack.com/make-cat5E.aspx