Users Guide

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Dell PowerConnect ArubaOS 5.0 | User Guide W-600 Series Controller | 435
If you get entries similar to the example below:
Figure 89 Driver=(none)
This means the driver does not work with these ports. Try the other drivers and see if they pick up the device.
Airprime is the reliable catch-all driver, Sierra is for certain Sierra cards, and cdc-acm is a legacy abstract
control modem driver. Your goal is to assign a driver for the unclaimed (none) interfaces (If#).
If no option driver appears or only storage interfaces appear, then the modem must be switched to data mode
(see “Mode-Switching” on page428).
Configuring the TTY Port
1. View the exposed TTY ports by executing the show usb ports 13 command.
Figure 90 show usb ports 13 command
In the example above, the command reveals four exposed TTY ports. One is the modem port, while the other
ports are for GPS, real-time statistics, or diagnostics. If the command does not reveal any ports or if only
storage devices (such as ‘sr0’) appear, then the device must be switched to data mode before proceeding. See
“Mode-Switching” on page428 for instruction.
2. Send a test AT command to determine the correct modem port.
Figure 91 show usb test command
In the example above, the TTY port responds with an ‘OK’. This indicates that ttyUSB0 is a valid modem
port.
There may be more than one modem port; you can continue to send AT commands to determine which ports
are modem ports. If the port is not a valid modem port, a time out error is generated as shown in the example
below
Figure 92 Time out error example.
In the example below, the TTY port does not exist, or is busy with a previous PPP session.
(host) #show usb verbose
...
I: If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I: If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
...
(host) (config-cellular new_card)# show usb ports 13
ttyUSB0
ttyUSB1
ttyUSB2
ttyUSB3
(host) (config-cellular new_card)#
(host) (support)#show usb test 16 ttyUSB0
AT
OK
TTY port responded to modem AT commands
(host) (support)#
(host) (support)#show usb test 16 ttyUSB1
Error: Timed out while waiting for modem to respond to AT commands
(host) (support)#