Im creating a site to review telephone systems. There are alot of products that support SIP phones which are generic phones. they work on multiple PBX systems.
So for example i want a category for Asterisk PBX and a sub category for SIP phones. I also have a category for pbxnsip and a sub category for SIP phones.
I would really like to link the SIP phones together so we are not having 10 categories with SIP phones all with different reviews.