hello guys, i got stuck. costumer called with a dbs system. it is the carded cabinet and i believe its an 824. he has 3 lines and wants to add one more. got the line in but the phones only show 3 lines. my dbs manual is for the flat pack 308 and 616. generally i use it to program this 824 type system too. trouble is this manual doesnt seem to include line appearance in programs. i guess they are fixed. does anyone know how to program the 4th line on this system. the part number is vb42050. thanks dave