nmcli and 3g modem on ubuntu 12.04.1 server

[Nataraj]

I have an old sierra wireless 3g modem which works fine on my laptop
running ubuntu 12.04.1 LTS.  I originally set it up using the network
manager applet, but am able to stop and start the modem using:

nmcli con up id 'AT&T LaptopConnect (data cards)'
nmcli con down id 'AT&T LaptopConnect (data cards)'

When I first plug it in, it shows up as follows:

# nmcli dev status
DEVICE     TYPE              STATE        
ttyUSB4    gsm               disconnected 
eth0       802-3-ethernet    connected    
eth1       802-11-wireless   disconnected 


# nmcli con list
NAME                      UUID                                   TYPE              TIMESTAMP-REAL                    
Wired connection 1        4c06abb6-33a1-479b-9864-0b7c58425c65   802-3-ethernet    Sat 03 Nov 2012 07:19:57 PM PDT   
AT&T LaptopConnect (data cards) b153762b-1eb9-4197-90f7-0701c495175a   gsm               Sat 03 Nov 2012 06:05:59 PM PDT   
CUSTOMER                  74b7522f-a6e9-4216-b8b1-3af87adf0617   802-11-wireless   never    


I'm trying to configure this modem to run on a small server which has no
GUI installed. When I plug it in the "nmcli dev status' shows the
device, however it does not show up in the "nmcli con list" and cannot
be started.  I'm guessing that it is not configured into the network
manager.  How do I do this with out the GUI?  Is there a config file
somewhere?  I have installed hal and added the device entries on the new
server the same as on my laptop.

Otherwise, can anyone tell me how to configure wvdial or an alternative
command line interface that I can use?

Nataraj