By default the TDA50 puts a call on hold when you press the flash on a SLT.

It is possilbe to program the TDA50 to pass the flash signal onto the telco in order to pick up a call waiting on a SLT?

look under efa settings on your slts you may have to enable it try a flash and a *60 for c.o. EFA flash if not try just *60

Thank you, that did the trick.

I was hoping to be able to just press the flash rather than "flash *60". Do you know if that's possible?

no but what I would do is swap codes 4 and 28(doubt you are using tie lines on your G)
1 for 1 then when a call comes in its flash 7 to
pick up co call waiting

Not using a tie line. I'll give that a try. Thanks again.