ZyXEL Communications Multi-service Access Platform MSAP2000 - Manual (Page 67)

4. System Components
MSAP2000 Technical Manual V3.0 4-16
4.9. Indoor Rack
The MSAP2000 chassis can be installed upon any 19 or 23-inch
rack, or on any rack that complies with ETSI ETR 300 119
standards. A MSAP2000 shelf is 5U in height; the installed COT
shelf includes a Fuse Alarm Panel installed on top, and a
ventilation fan set. The MSAP2000 RT shelf also requires a
Fuse Alarm Panel installed on top; an Optic Fiber Distribution
Frame and a Digital Distribution Frame can be added if necessary.
The main shelf is installed below the Digital Distribution Frame,
and comes with a ventilation fan set. An extension shelf and
additional fan set can be installed if required, but MSAP2000’s
extension shelf does not required fans, under normal
circumstances.