Sending an SMS message

• 7-bit GSM for Latin text with support for European characters − (coding = 0);
• 8-bit ISO-8859-1 (ASCII) for Latin text or binary data − (coding = 1);
• UCS2 (UCS-2BE or UTF-16BE) for national alphabets (for example, Russian) − (coding = 2).

The server does not accept more than one identical request for sending SMS messages within a minute to protect against errors and loops in the Client-side program in order to reduce the load and not spend the Client's funds, as well as to prevent multiple messages from being sent to the same subscriber.

The server also blocks sending more than 50 messages to one subscriber, which were sent with a break between messages of less than 30 seconds, to protect against flooding and unnecessary debiting of funds from the Client's account, since many operators do not pass a large number of messages to one subscriber in a short period of time.

When sending a composite message, all SMS parts must be transmitted to the server within a minute. Otherwise , the operator may reject the message, since to check for filters and templates, all SMS parts must first be glued together, and most operators wait no more than a minute.