Specifications

Chapter 18 – TCP/IP App AT Commands
Multi-Tech Systems, Inc. CDMA AT Commands Reference Guide (PN S000294K) 133
Chapter 18 – TCP/IP App AT
Commands
This section details the AT commands that are available with the TCP App feature. This feature provides functionality for
establishing multiple TCP and UDP compliant non-blocking socket connections over an IP network while retaining AT
command level control of the modem.
The TCP App feature includes a set of AT commands and unsolicited responses for host application initialization and control of
its functionality. The following table summarizes the AT commands and responses that are used with the TCP App feature.
Command Description
AT+WPPP Start or end a PPP session
AT+WOSK Open a socket
AT+WCSK Close a socket
AT+WSTX Transmit socket data
AT+WSRX Receive polled socket data
AT+WGSS Display connection status
AT+WTMO Configure socket transmit timeout
AT+WCRX Configure receive data mode
AT+WIPC Show current module IP address
AT+WDNS IP address lookup
AT+WFDM Force dormant mode
Response Description
+WPPP PPP session status
+WSKS Socket state change
+WSKE Socket open/close error
+WSTX Socket data transmission status
+WSTE Socket data transmission error
+WSRX Received socket data
+WSRE Socket data error
+WDOR Dormant mode status change
+WDNS DNS lookup indication
A number of standard AT commands are not available when the TCP App feature is in use; that is, a AT+WPPP session has
been successfully started. See Chapter 20 for a list of these restricted AT commands. The ERROR result will be returned in
their attempted use.