It comes with the added security of redundant disks to ensure high availability, more powerful processing power than the Office Appliance and additional storage space. The unit is a 2U form factor ideal for mounting in a rack. The full range of edgeBOX services are available along with configurations that can provide connectivity to analogue and digital phone lines and phone equipment.
Models are available with optional ports for connecting phone lines and phones/faxes in the following combinations:
| Model | Phone Line Ports | Phone/Fax Ports |
| CLK-EBAP-BUS | None | None |
| CLK-EBAP-BUS-1PRI | 1 E1/T1 | None |
| CLK-EBAP-BUS-4BRI | 4 ISDN2 | None |
| CLK-EBAP-BUS-2PRI | 2 E1/T1 | None |
| CLK-EBAP-BUS-2PRI4BRI | 2 E1/T1 + 4 ISDN2 | None |
| CLK-EBAP-BUS-71FX | 7 Analogue | 1 Analogue |
| CLK-EBAP-BUS-8FXO | 8 Analogue | None |
| CLK-EBAP-BUS-8FXS | None | 8 Analogue |
| CLK-EBAP-BUS-44FX | 4 Analogue | 4 Analogue |
| CLK-EBAP-BUS-1PRI31FX | 1 E1/T1 + 3 Analogue | 1 Analogue |
| CLK-EBAP-BUS-8BRI | 8 ISDN2 | None |
