ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 30)

2. System Architecture
MSAP2000 Technical Manual V3.0 2-10
2.8. Layer 2 Switch
Layer 2 switch
MSAP2000 can connect to Edge router to provide Ethernet
leased line with the layer 2 switch module ESM.
Layer 2 switch
at RT
Service Providers can easily provide FE leased line service with
selectable bandwidth to enterprise in office building without extra
CPE or switch. In an overall IP environment, MSAP2000 can be
installed in building basements to serve as a high density Layer 2
switch, and provide VoIP services via a FTTB optic network.