Siemens MC55 AT manual Address notation

Address notation

Server addresses must be provided as IP addresses in standard dot-format (e.g. "192.168.1.2") or as server address names resolvable by a DNS server (e.g. "smtp.myserver.de" or "pop3.myserver.de").

Timeouts

Timeouts are not part of the Internet AT command functionality implemented in MC55 and, if desired, are the responsibility of the host application. It is recommended that the host application validates URCs and AT com- mand responses and reacts adequately, for example by sending a close message or starting a timer.

Socket UDP client

The significant differences between the TCP and UDP protocols imply that UDP sometimes requires particular procedures or even specific parameters. Details on how to handle UDP services can be found in extra notes or are included in the general parameter descriptions.

Using the DCD line to detect the connection status of Internet services

With AT&C you can configure the DCD line of the used serial interface to indicate whether an Internet service is active. For Socket, HTTP, SMTP and POP3 the states "Up" or "Connecting" are indicated, for FTP only the state "Up".

MC55_ATC_V04.00	Page 221 of 475	3/17/06
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