Custom Dial Plan


I wanted to create my own custom dial plan and hence was curious to know from where I can get some guides on the codes used to create a dial plan. I googled through various sites and understood a lot but thats not exactly what I want. Is there any guide or book available that contains the A-Z of the codes used for the same?

Have you looked at “Asterisk: The future of Telephony”

I haven’t wenyt through that but will surely do.