Multitech MultiModem iSMS SF100-G Administrator's Manual page 83

Parameter Description
If modem is not specified in the request, send API job is distributed using all the available modems.
Group The pre-defined group names must be in double quotes.
The maximum size of group name is 50 bytes
Text The message text to be sent.
Enable Extended ASCII in the MultiModem iSMS to send both ASCII and extended ASCII characters. By
default, Extended ASCII is disabled, and the message can have only ASCII characters.
If Unicode is enabled (and if enc is not specified in request), SMS text is only in Hexadecimal form.
If Extended ASCII and Unicode are disabled and spanned SMS value is 1, a maximum of 160 characters
can be sent.
If Extended ASCII is enabled and spanned SMS value is 1, a maximum of 140 characters can be sent.
If Unicode is enabled and spanned SMS value is 1, a maximum of 70 characters can be sent.
If the spanned SMS value is more than 1, the maximum number of characters allowed for each encoding
scheme is defined as follows (where n represents the span value):
ASCII – n * 154 characters
Extended ASCII – n * 134 characters
Unicode – n * 64 characters
Characters entered beyond the allowed limit are truncated.
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Appendix A – Application Programming Interface (API)
MultiModem® iSMS System Administrator's Guide