Users Guide

Table Of Contents
428 | W-600 Series Controller Dell PowerConnect ArubaOS 5.0 | [User Guide
Internal Access Point (AP)
The W-651 controller includes an internal AP. The internal AP is provisioned in the same way as any other
external AP. The provisioning data is stored in the NVRAM. The internal AP identifies itself to a Master
controller as the W-651. The internal AP can operate as an AP, Mesh Portal, or an Air Monitor. However, the W-
651 internal AP can not operate as a remote AP, a mesh point, or an RF Protect sensor.
USB Cellular Modems
USB Cellular Modems are supported via a USB port. ArubaOS supports several EVDO (Evolution Data
Optimized, up to 3.1 Mbps, CDMA) and 3G HSPA (High-Speed Packet Access, 3G data service) modems. The
3G HSPA is provided by AT&T in the United States and numerous other 3G providers worldwide.
Functional Description
Plug the USB Cellular Modem into the USB port of the W-600 Series Controller. The USB Cellular Modem is
automatically detected and negotiates a PPP IP address. If the modem fails to obtain a PPP IP address within 45
seconds, the controller ignores the modem’s presence, and boots as if the modem is not present.
Mode-Switching
Many of the newer modems contain multiple USB devices; creating a very elegant plug-n-play solution. When
your USB Cellular Modem is first powered on, a storage device is registered. This storage device contains the
software driver/executable necessary to install and operate the modem.
Once the software installation is complete, the modem must mode-switch from a storage device to a registered
modem device. Mode-switching varies by manufacturer. For example, The Novatel modem mode-switches via a
SCSI eject command; the Huawei modem mode-switches via a SCSI rezero command, while the Sierra modem
mode-switches via a specific USB command. Once the mode-switching is complete, the modem automatically
registers itself.
The controller can dial (via the modem) your Service Provider to initiate a PPP session. During the boot
sequence, the controller issues your device’s mode-switching command, every few seconds, until the PPP link
connects.
USB Modems Commands
To support the USB cellular modems on the W-600 Series Controller, cellular specific commands are available at
the command line (see Figure 75 and Figure 76). For detailed information on these commands, refer to the
Command Line Reference Guide.