Average Reviews:
(More customer reviews)The Apple USB Modem is a controllerless or software modem based on the Motorola SM56 design. The advantages of a software modem are low cost, low power consumption, and compact design. The disadvantage is that modem processing is offloaded to a specialized driver that runs on the host computer. In this case, Apple has customized Motorola's driver to produce a generally solid product.
At the time of this writing, Apple has discontinued the Apple USB Modem (MA034Z/A) but they are still widely available for around US$50.
Testing Notes: Software modems require a driver that can pump real-time audio like data to the modem's transceiver regardless of any other system software that may be running. In my own testing, I've found it's important to connect the modem to a reliable USB Hub as close to the host computer as possible. Apple's USB Modem driver generally worked well but could fail under certain conditions like launching Disk Utility with external FireWire drives attached. I tend to prefer controller based modems for their greater stability, but the Apple USB Modem is certainly an elegant and compact unit.
The US Robotics USB Modem (USR5637) is a traditional controller based modem from a manufacturer with a solid product history. The modem includes its own control processor which understands AT commands directly, so only a basic USB serial driver is needed. In my testing, this modem worked well.
The USR5637 is widely available for around US$50.
Testing Notes: The manual included with the modem is unclear about the installation procedure. You'll need to install the software from the included CD first, and then plug-in the modem for it to be recognized by Mac OS X. In the Network Preferences panel, select USB Modem, click Advanced, and set the Vendor to "Other". This modem is about the size of a cell phone (significantly larger than the Apple USB Modem).
I had no trouble running both the Apple USB Modem and USR Modem at the same time. I'm the developer of Phone Amego which uses USB modems for landline support. Having run both modems continuously over an extended period, I prefer the USR modem for its stability. It's more modem for about the same price.
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