DSL-modem on USB. Hw to mount?

[HermanAa]

My ADSL modem is connected to USB:
 (It is capable to connect to a LAN-card
 that I do not have. Cable supplied.)

n0jn at n0jn-desktop:~$ lsusb
Bus 001 Device 002: ID 0915:0005 GlobeSpan, Inc. <<connected OK.
Bus 001 Device 001: ID 0000:0000
n0jn at n0jn-desktop:~$

Should I mount it? How?
Does it need additional software?

I am supposed to connect to:
www.globequest.com.ph
I have username and pw.

I already studied this one.
For information on PPPOE modems see this guide on the Ubuntu wiki.
 https://wiki.ubuntu.com/ADSLPPPoE

Herman in PHL (Philippines).
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