AT Commands Reference Manual - wireless netcontrol GmbH

TCP/IP: MIP Commands Using Cases
Network after a spooling timeout (200 mS), otherwise the data will be sent to the Network
immediately.
ODM socket can be opened in listen mode by simply omitting the parameter.
Upon ODM socket is opened in listen mode, it can read/write binary raw data only after accepting
remote side socket (+MIPOPEN unsolicited sent to terminal).
When remote side socket is closed or a TCP error occurred, the ODM socket closes
automatically, the module operation mode is restored to command mode and +MIPSTAT
unsolicited response is sent to terminal.
CTS
When using a TCP ODM socket, the CTS is turned off (XOFF) to control data flow when the
serial port buffer is almost full. The CTS is turned on (XON) when receiver is ready for more
data.
Switching from Online Data Mode to Pseudo-Command Mode
The user can suspend an opened Online Data Mode socket for example, by transmitting an escape
sequence (by default "+++") from terminal (when pseudo-command mode was enabled by
+MIPOPEN parameter. In this case, the module is switched to
Pseudo-Command Mode, allowing the user to enter AT commands from terminal. When the
ODM socket's data arrives from Network and the module is in Pseudo-Command mode, a special
unsolicited event +MIPDATA will be sent to terminal indicating the amount of received bytes
(see "+MIPDATA, Network Incoming Data Unsolicited Indication in Pseudo-command Mode").
The ATO command can be used to resume Online Data Mode from Pseudo-Command mode.
When socket is in Online Data Mode, Serial communication DCD line is enabled.
Avoid ODM UDP Data Loss on High Data Rate
In common NWs, and especially in HSDPA NW, one MUST consider the following constraint
regarding Motorola IP ODM UDP Downlink transfer session:
In order to avoid UDP significant Data Loss Rate, the best performance achieved is when using
High Connectivity throughput (i.e. USB, or fast UART1) if H24 is the Receiving side. Otherwise
significant UDP Data Loss Rate on the NW Layer may occur. In case slow UART is used
(115200 or less) the sending side MUST limit the throughput or suffer significant Data loss.
SSL
General Description
SSL (Secure Socket Layer) and its successor TLS (Transport Layer Security) are cryptographic
protocols which provide endpoint authentication and communication privacy over the TCP/IP.
There are slight differences between SSL 3.0 and TLS 1.0, but the protocol remains substantially
the same. The term "SSL" as used here applies to both protocols unless clarified by context.
Cipher Suite
Cipher Suite is a set of cryptographic algorithms. A cipher suite specifies one algorithm for each
of the following tasks: Key exchange, Bulk encryption and Message authentication. For example,
Cipher Suite TLS_RSA_WITH_RC4_128_MD5 specifies RSA as key exchange algorithm, RC4
4-26 H24 - AT Commands Reference Manual April 15, 2010