Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 17)

Verilink Access System 2000: The Basics 2-1
Chapter
2
System Information
This chapter provides system information for AS2000, including
shelf buses, application module descriptions and clock timing
considerations..
Shelf Units
AS2000 has three different types of shelves, described below:
Multi-line Shelf Multi-line Shelf units (MLS 2000 and 2200 series) hold 13
application modules and 2 modular power supplies (AC or DC).
The difference between the MLS 2000 and MLS 2200 series shelf
units is the structure of Data Bus A on the backplane of the shelf.
Quint-line Shelf The Quint-line Shelf (QLS 2500) holds 5 modules and contains an
internal AC or DC power supply. This shelf is a standalone unit.
Dual-line Shelf The Dual-line Shelf (DLS 2100) holds 2 modules and is powered by
external power supplies. Verilink offers a universal AC/DC power
supply.
Figure 2-1 illustrates the Multi-line, Quint-line, and Dual-
line shelf units.
NOTE: the PWR 2940 power supply for the Dual-line Shelf operates
only with 110VAC or 48VDC inputs. Some units may indicate
they support 240VAC operation, but this is not correct. Use
the newer PWR 2950 power supply where 240 VAC power
input is required.
NOTE: When an HDM 2180 or HDM 2182 is used in a Dual-line shelf,
the use of two external power supplies is suggested. If an
NCM 2000 is added, the use of two power supplies is
required.