Cdc_Ncm Mode; Overview; Relevant Ema Ports - OptConnect ema Windows Networking Manual

Useful troubleshooting information is available in Section 2.4.
2.2

CDC_NCM Mode

2.2.1 Overview

Section 2.2 contains instructions for configuring ema using CDC_NCM protocol to establish a data
connection. CDC_NCM protocol enables a high-speed peripheral, such as a cellular modem, to establish
an internet connection over USB. This internet connection then behaves like a regular ethernet
connection.

2.2.2 Relevant ema Ports

First, the user should familiarize themselves with the available ports that ema presents to Windows 7.
When ema is powered on with the USB cable connected at ema:Play (J6), several USB ports will
enumerate. To see the available ports, open the Windows Device Manager, and open the "Ports" tab. ema
should enumerate in the device manager similarly to the example Figure 1:
Figure 1
From Figure 1, one modem and five USB Ports have enumerated in the device manager. The USB0 port
enumerates as "Telit Mobile Highspeed Modem x", while the other USB ports enumerate as "Telit Mobile
(USBx)(COMx)". The COM port associated with USB0/"Telit Mobile Highspeed Modem x", can be found by
right-clicking on the device in the "Modems" tab, and clicking "Properties". In the Properties window that
opens, click the "Modem" tab and the COM # will be listed as shown in figure 2. Take note of the COM #
for USB0 port for later use in this section. In this example the COM # is 24. Only USB0 and USB3 are
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