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Full Discussion: Modems still in operation?
The Lounge What is on Your Mind? Modems still in operation? Post 302508535 by DaveJohnson on Monday 28th of March 2011 11:55:53 AM
Old 03-28-2011
We have 500+ stores spread across the US (42 states). We use modems as fail over in the event the primary DSL or satellite connection goes down.
The credit card industry uses both network connection (Ethernet) and phone lines (modems) to do its business. Usually the phone line is fail over, but some small retailers use that as the only connection.
Large modem banks are still a good size chunk of the modem manufactures business, sold mostly to credit card processing companies.
 

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UMODEM(4)						   BSD Kernel Interfaces Manual 						 UMODEM(4)

NAME
umodem -- USB modem support SYNOPSIS
To compile this driver into the kernel, place the following lines in your kernel configuration file: device umodem device ucom Alternatively, to load the driver as a module at boot time, place the following line in loader.conf(5): umodem_load="YES" DESCRIPTION
The umodem driver provides support for USB modems in the Communication Device Class using the Abstract Control Model. These modems are basi- cally standard serial line modems, but they are accessed via USB instead. They support a regular AT command set. The commands can either be multiplexed with the data stream or handled through separate pipes. In the latter case the AT commands have to be given on a device separate from the data device. The device is accessed through the ucom(4) driver which makes it behave like a tty(4). HARDWARE
Devices supported by the umodem driver include: o 3Com 5605 o Curitel PC5740 Wireless Modem o Kyocera AH-K3001V Mobile Phone(WILLCOM) o Kyocera WX320K Mobile Phone(WILLCOM) o Metricom Ricochet GS USB wireless modem o Sierra MC5720 Wireless Modem o Yamaha Broadband Wireless Router RTW65b o ELSA MicroLink 56k USB modem o Sony Ericsson W810i phone SEE ALSO
tty(4), ucom(4), usb(4) HISTORY
The umodem driver appeared in NetBSD 1.5. This manual page was adopted from NetBSD by Tom Rhodes <trhodes@FreeBSD.org> in April 2002. BUGS
Only modems with multiplexed commands and data are supported at the moment. BSD
November 22, 2006 BSD
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