Asterisk -->> extension or callerid digit maximum leng

Hello, all,

I have a quad-PRI PCI TE405P card and have a question.
How much digits the extension or callerid can be long?
I need 26 digits for extension.
Are there any restrictions in the zaptel software or in asterisk?

I’ll be thankfull for any answer.

I’ve had a quick look through the source code, but haven’t found anything obvious. I suggest you have a thorough look through the source code yourself and you’ll probably find the answer(s) you want.