Specifications: Interfaces/Ports: 8 x T1/E1 WAN Interfaces/Ports Details: 8 x RJ-48C T1/E1 WAN Data Transfer Rate: 1.54 Mbps T1 2.05 Mbps E1 Compatibility: ADTRAN NetVanta 4305 ADTRAN NetVanta 4305 Base Chassis with IP Enhanced Software (VPN Bundle) ADTRAN NetVanta 4305 Chassis ADTRAN NetVanta 4305 Chassis w/ Enhanced Feature Pack ADTRAN NetVanta 4305 DC Chassis ADTRAN NetVanta 4305 DC Chassis w/ Enhanced Feature Pack ADTRAN NetVanta 5305 ADTRAN NetVanta 5305 DC ADTRAN NetVanta 5305 Sub-rate T3 Bundle Dimensions: 1" Height x 6" Width x 8.50" Depth