I need to generate FSK data in accordance with the BELL 202 spec, that I
understand are as follows
1>Analog, phase coherent, frequency shift keying
2>Logical 1 (Mark)  = 1200 plus or minus 12Hz
3>Logical 0 (Space) = 2200 plus or minus 22Hz
4>transmission rate = 1200 BPS


Have anybody done it using a PIC plus whatever additional circuit is
required.   IF YES, would you mind sharing your experience with me.

In addition, I was not able to find the full spec on the internet.  I
searched for
a>Bell 202
b>TR-NWT-000030
c>CLASS spec's
and found all kind of text's related or not, but not the spec's themselves
regards
juan abba