PCI Module Location: for PCI modules provided by Essence Technology Solution, Inc., users are suggested to insert the module into slot 0 if only one module is purchased. If you have 2 modules, you can insert any module into any slot except BRI81004, DSP81100 and IPSec81003, which are suggested to insert into slot 1. The slot location of BRI81004, DSP81100 and IPSec81003 would not matter if you use only those modules. Please see following diagram for slot location.

Easy and Fast Configuration (Web Interface Configuration, Keypad Configuration, Auto Provision, and Telnet Configuration) Good voice quality Highly integrated and compatible with Essence VoIP series High Stability Wan port support IEEE 802.1af Power over Ethernet (Only EIP-7012P)