7bit GSM to ASCII and visa versa

<i><b>Originally posted by : Paul Distant (pdistant@linneydesign.com)</b></i><br />I'm creating an application to allow users to upload a readable text file.<br />What the application needs to do is to read from this file, and encoded it as packed 7-bit GSM.<br />Eg: 43 b4 3c 3d 07 bytes = Chris<br /><br />The application also needs to do reverse.<br />i.e. read 43 b4 3c 3d 07 bytes from the file and recognise it as 'Chris'.<br /><br />Does anyone know of a tool that can do this<br /><br />Cheers,<br />Paul<br />