12.04LTS and the Telstra 4G mobile wireless modem

[Geoffrey]

I have made some progress with this Internet modem (but I'm not there
yet).
Firstly I established the current sierra modem driver version in each of
my two computers using the terminal command: 'modinfo sierra'
PC1 with 10.04LTS: v1.3.8
PC2 with 12.04LTS: v.1.7.16
I then referred to the Sierra Wireless link given by Jared Norris
(thanks) and downloaded the latest driver tar file: v.1.2_1740
Note: This is listed for kernels 2.6.32 (10.04) on up to the last
mentioned 3.0.x. The kernel for 12.04 is 3.2.0.
The procedure used for PC2 (12.04LTS) was an abbreviated version of that
given by Sierra:
1. Open the tar file and extract the three files Makefile, sierra.c and
sierra_net.c to Desktop.
2. Move these three files to the Home folder (directory).
3. Open Terminal and enter the command: cd /home/geoffrey
	The prompt is now 'geoffrey'
4. Enter the command: make
	This should compile the driver files. It did.
	 Stay in the terminal.
5. To install the divers enter: sudo make install
	(Enter your sudo password if requested)
6. Verify installation with the command: modinfo sierra
	This duly showed that new sierra version v.1.2_1740 was successfully
installed.

I then plugged in the Sierra modem Aircard 320U (not 360U as I have said
incorrectly previously), The blue power led was on and the blue signal
LED flashed indicating that it was ready to communicate.

I then created a new connection name using Ubuntu's connection manager
which correctly identified the modem as the Sierra Aircard 320U. I
entered my previous user name and password and APN (telstra.bigpond).
Next I opened the Internet connection menu and found all the Mobile
Broadband connection names including the new one just created. These
have not been seen before so it seemed to be working at last.
However attempts to connect failed because the transmission signal (the
radiating applet) stopped after only 2 seconds, not long enough to make
a connection. It is not normal for the transmission to stop so quickly.

And this is as far as I have got. Close but not near enough. Any further
advice will be gratefully received.
Geoffrey Combes