Dan231 and NTEDave,
For some reason, by default, the Handsfree Flag is always set to Yes and the Ring Intercom Always flag is always set to No. This means by default that any IC calls between phones will immediately go handsfree.
We have solved the problem with our default database to always make sure that the Handsfree flag is set to No and the Ring Intercom Always flag is set to Yes for all phones which reduces the problem of ever getting a Handsfree call as you have security measures built in.
We also have an Internal Forwarding Path set to send IC calls to Voicemail for those phones that have a Mailbox; again which reduces the amount of these issues for sites that do not want Handsfree.
Thanks,
TE