How many digits can be entered in a DID/DTMF routing rule? Author: Luis Fernandes November 30, 2018 04:16 AnswerApplies to GFI FaxMaker A DID/DTMF routing rule supports a maximum of 32 digits. Related Articles: How to change the number of DTMF/DID digits capturedHow to log captured DTMF/DID digits with GFI FaxMaker