Home / Shop / Browse By Category / Telephone Systems / KSUs / ESF-XE-10 Expansion KSU for Professional Level IIA View cart “NEC Aspire 0891026 SLT Interface Adapter (IP Series)” has been added to your cart. ESF-XE-10 Expansion KSU for Professional Level IIA$0.00 ESF-XE-10 Expansion KSU for Professional Level IIA quantity Add to cart SKU: 720105 Categories: All NEC Products, Browse By Category, Browse By Manufacturer, Electra Pro II, KSUs, NEC, Telephone Systems Tags: expansion KSU, Key Service Unit, KSU Description Description ESF-XE-10 Expansion KSU for Professional Level IIA Related products Browse By Manufacturer , NEC NEC Aspire 0891027 2PGDAD Door Box Adapter Browse By Manufacturer , NEC NEC Aspire S 4 Port Trunk Card 0895046 Browse By Manufacturer , NEC NEC Aspire Analog Interface with Ringing 0890056 Browse By Manufacturer , NEC NEC Aspire 4COIU-LS1 4 CO LS Trunk Card