Question : Sending "_" character from hyperterminal

Hi, I am trying to send "_" character to mobile phone from hyperterminal,but it is appearing as Section mark on mobile phone.Any Solution?

Answer : Sending "_" character from hyperterminal

The function converting the characters to GSM 7 bit seems OK, except that it doesn't cover all ANSI characters (I'll post a table if you want) and this bit seems to put the characters the wrong way round :-

     PDU = iDec & PDU
      Next Y
       
Still, my next concern is that I don't see the GSM pack, where each 7-bits generated from the string are packed into PDU bytes one after another and filled out with zeros at the end.
This is important if you use PDU mode. After the complete PDU has been constructed it is then converted into a hex string nibble-wise.