The Allworx 48x License T1 Key #2 8210042 is the second of two T1 licenses. The Allworx 48X supports two T1's but you must install the license key(s) to activate them. You much activate the T1 Key #1 before you activate T1 Key #2. You must purchase each license key separately.
Please include the MAC address of the unit you would like the key installed on in the order notes. This will expedite the key installation process.