OK, bare with me as this will be hard to explain... What I'm trying to do is provision each and every phone in our company to utilize 2 separate extensions. However, Instead of creating a custom template for each and every phone, I would like to create a single template for all the phones and somehow utilize/modify the built in 3CX variables to populate the second extension. For example, all the the phones/extensions are setup accordingly: Phone 1 [E1] 112 [E2] 212 Phone 2 [E1] 119 [E2] 219 In the provisioning template, extension 1 is dynamically populated by this entry: <Auth_ID_1_ group="Ext_1/Subscriber_Information">%%extension_auth_id%%</Auth_ID_1_> Ideally, I would like modify the %%extension_auth_id%% variable to somehow use it for extension 2 also. i.e. <Auth_ID_2_ group="Ext_2/Subscriber_Information">(%%extension_auth_id%%)+100</Auth_ID_2_> or <Auth_ID_2_ group="Ext_2/Subscriber_Information">1 & RIGHT(2,%%extension_auth_id%%)</Auth_ID_2_> Is it possible? I'm not familiar with the 3CX scripting language, so I have no idea if it can handle basic mathematical functions or not.