PHP: who to convert this type of code to text

i am receiving this type of code from telecom operator for a reply sms.

(DC04)\x06\x05\x04\x04\xd2\x00\x00(a5xwLaMa8Bb4) 
(DC04)\x06\x05\x04\x04\xd2\x00\x00(mySUMmKeW1wv) 
(DC04)\x06\x05\x04\x04\xd2\x00\x00(KA3qCYf7tiko)

Now my question is what type of code it is & how can i covert this kind of code to text/binary format. thanks in advance