12.04 LTS and Telstra 4G moble wireless modem - Resolution

[Geoffrey Wilfred Combes]

As of today I am connecting successfully to 12.04 LTS via the new
Telstra modem a Sierra AirCard 320U.
The key to getting there was Jared Noriss's advice to obtain and install
the latest Sierra driver for Ubuntu. He provided the website. The
procedure I used to install the driver was given in my mailing dated 4
September. Hopefully this driver will be valid for future Ubuntu
versions at least for some time.
I had further problems (preventing connection) related to registering
the modem. These were:
1. To register one must install the software provided on the modem in a
Windows OS. Installation my old XP crashed halfway through the process
preventing me from using the Windows connection manager. 
2. The software was successfully installed on a Windows 7 laptop but
registration could not be completed because the modem oscillated between
search and ready to connect. This is not uncommon and it is thought that
the modem is trying more than one band (it has three).
3. It is not possible to register using the previous user name (as I was
doing).
All of these problems were resolved by the Telstra (technical)
consultant in the local Telstra shop. He carried out the registration on
his laptop and, importantly at my request, kept my previous user name
and so preserved my email address. The upside is that the new modem and
its link to Telstra is much faster than my old modem. 
Geoffrey