Service Centre address, string type, converted in the
currently selected character set (see +CSCS)
TP-User-Data
* If <dcs> indicates that GSM 03.38 default alphabet is used
and <fo> indicates that GSM 03.40 TP-User-Data-Header-
Indication is not set (bit 6 of <fo> is 0), each character of
GSM alphabet will be converted into current TE character
set (see +CSCS).
* If <dcs> indicates that 8-bit or UCS2 data coding scheme
is used or <fo> indicates that GSM 03.40 TP-User-Data-
Header-Indication is set (bit 6 of <fo> is 1), each 8-bit octet
will be converted into two IRA character long hexadecimal
number (e.g. octet 0x2A will be converted as two characters
0x32 0x41).
Class 2 messages and messages in the "store" message
waiting indication group result in indication as defined in
<mt>=1.