ESIB(8)-U10

Type: Digital External/Internal Line Expansion Card (ESI)
Capacity: Basic 8 ports (supports 8 digital telephones)
Upgrade: Can add ESIE daughter boards to expand to 16 ports.
Compatible Models: NEC Electra Elite 48/192, IPK and IPK II
Connectivity: Compatible with NEC DTU, DTP and DTL series telephones.
1 year warranty