ESS: refer to prompted value in speed dialing

[oliv]

Hello,

I'm discovering Enhanced DSS Keys and it looks promising.

I would like to implement something like this:
- interact with user through a custom prompt asking for a value
- then dialout a prefix with whatever the user replied in previous custom prompt

Simply settings something $P5N4$ does allow me to dialout whatever was prevously entered but I can prepend user reply with a fixed prefix.

In other words, if user enters 1234, 1234 is dialed out.
What I would prefer, is that if user enters 1234, then *991234 would be dialed out.

Best regards