How can I add a # char to a contact phone number


I would like to automate calls to various webex and skype meetings. However when I attempt to use the # character in the ID field I’m told it is an invalid number. Commas and * chars are accepted when I enter the contact however they don’t seem to be dialable. Ordinary numbers work fine.

I see that a similar question on how to add extensions to contacts was asked in 2014 without a reply.

I’m using jitsi version 2.10.5550-1 on LinuxMint. It is connecting to our corporate comms system.