USR 5633 Robotics Modem in Debian

Joey Hess's picture

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Camaleón wrote:
> But be prepared for the worst, USB modems can be very difficult to
> support in linux if the manufacturer did not provide the drivers nor
> specifications. In this regard, old serial modems are much better than
> USB ones (no drivers needed) ;-(

This is less the case now than it was 5 to 10 years ago. Now there are
at least two USB modems from different manufacturors that advertise
linux support in their literature and work using the kernel's ACM driver.

TRENDnet TFM-561U
USRobotics USR5637

(And one that advertises linux support but requires the manufacturer's
driver, which I did not try as it's unlikely to work on arm.)

Since there are fewer modem users these days, and the remaining ones are
probably unlikely to be linux users, the old information about USB modems
not working in linux lingers where searches can find it. But, a targeted
search for a particular model before buying can generally tell if it
will work.

USR 5633 Robotics Modem in Debian

Camaleón's picture

On Sat, 28 May 2011 12:57:51 -0400, Joey Hess wrote:

> Camaleón wrote:
>> But be prepared for the worst, USB modems can be very difficult to
>> support in linux if the manufacturer did not provide the drivers nor
>> specifications. In this regard, old serial modems are much better than
>> USB ones (no drivers needed) ;-(
>
> This is less the case now than it was 5 to 10 years ago. Now there are
> at least two USB modems from different manufacturors that advertise
> linux support in their literature and work using the kernel's ACM
> driver.

Yes, there are a exceptions. Also, some pure softmodems work with
"slmodem" driver.

> TRENDnet TFM-561U
> USRobotics USR5637
>
> (And one that advertises linux support but requires the manufacturer's
> driver, which I did not try as it's unlikely to work on arm.)

Sadly sometimes you are stuck with the modem you already have and cannot
replace it. In a perfect world, one could choose the best modem for his
needs.

> Since there are fewer modem users these days, and the remaining ones are
> probably unlikely to be linux users, the old information about USB
> modems not working in linux lingers where searches can find it. But, a
> targeted search for a particular model before buying can generally tell
> if it will work.

We, at the office, have five of those hardware-based modems (rs-232) and
one Eicon card (isdn, PCI based), we use them for faxing along with
HylaFAX so dial-up modems still have their use. And I would not change
none of those serial modems for a new one featuring USB (I find the
serial port more reliable than USB) Smile

Greetings,