Wireless network card, as its name implies, is not on the cable network card, is a media  to surf the Internet , which is widely used currently in wireless communications network. At present, as China only has two network standards China Mobile GPRS and China Unicom's CDMA (1X), so the common wireless network card includes two categories: the CDMA wireless network card and GPRS wireless network card. There is also a CDPD wireless network card.

CDMA wireless network card
CDMA (Code Division Multiple Access) card, is the Internet connection device for China Unicom's CDMA network. CDMA allows all users to use the full band, and takes other users' signals as noise, does not have to fully take into account the signal collision.

GPRS wireless network card
GPRS card is the wireless Internet access to China Mobile's GPRS network. Its full name is "General Packet Radio Service", using Packet-Switched concept to develop the wireless transmission. The so-called packet-switched is to package Date into a number of separate packets, and then send out these packets to one by one, and the advantages of using packet-switched is that it occupies wide band only when send information, also pay for transfer amount, which is a more reasonable way of accounting for the user, because most of the time bandwidth of such data transmission is indirect setting.

Compared to the original GSM dial-up circuit-switched data transmission, GPRS is a packet-switched technology, with advantages of  "on-line real-time", "cost according to the amount," "quick login", "high-speed transmission" and "switch freely".

CDPD wireless network card
CDPD (Cellular Digital Packet Data) uses Packet Data method, which is the best recognized wireless data communication network. It is an open system architecture based on TCP / IP, combines open interfaces and high transmission speed, user determine the unit, air link encryption, air data encryption, data compression and error correction and retransmission to use the world standard IP addressing mode wireless access powerful combination to provide the same level of seamless network connectivity, multi-protocol networks. CDPD has a fast speed (19.2kbps), high security of data, which support the users handoff and network-wide roaming, broadcasting group call, and support data user s with 100km / h mobile speed, and also interoperable to public data network .

CDPD is particularly applicable: more user point, wide distribution, mobile, short message, frequency places. At present, the main applications are in the following areas: financial transactions, transportation, telemetry and remote monitoring, mobile office, and so on.