Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 31)

Verilink Access System 2000: The Basics 3-1
Chapter
3
Site Planning
This chapter provides general information for site planning.
Sections within this chapter provide general and detailed
information on the following topics:
• Installation planning
• FCC Part 68 Compliance Statement
• Application requirements and ESD considerations
Installation Planning
When planning a site or adding to an existing AS2000, several
factors require consideration:
• General rules for module installation
• Cabling requirements
• Mechanical and environmental considerations
• Node Configuration Plan
Module
Installation
Access System 2000 modules within each system node have
explicit requirements for installation.
TABS-Based Nodes The following requirements are for TABS-based nodes.
• The SCC or NCC and corresponding CIM usually resides in
Shelf 1, Slot 1.
• DIUs follow the corresponding SCC, NCC, or TAC in successive
slots.
• The TIU clock signal can be passed to other shelves in the
node using the data bus expansion cable.
• All DIUs associated with an NCC, SCC, or TAC must be in the
same shelf when the data buses are not extended.
• NCC, SCC, and TAC modules can use one data bus—A, B, or C—
to exchange data with their associated DIUs.
• In drop-and-insert mode, only Bus A is used.
• A node must not exceed four shelves (2 MLS and 2 DLS units
with an NCC, or 4 MLS units with an SCC or NCM).
• Certain TABS-based modules cannot function in the Quint-line
shelf, such as the NCC and the SCC.