Verilink NCM 2000 (880-502623-001) Product Manual - Manual (Page 20)

NCM Overview
1-10 Verilink NCM 2000
• The DIDCSU 2912 module can function as a standalone dual
port CSU/DSU. With an NCM as the node controller, the
DIDCSU supports the mapping of timeslots across the shelf
backplane from one application module to another.
Mixing TABS and
ACP Modules
All AS2000 application modules use either the TABS bus or the
newer ACP bus to communicate with the controller. The NCM can
support up to 51 elements (besides the NCM) in up to four shelves.
TABS-based and ACP-based shelves can be mixed in any
combination.
Table 2-1 lists TABS and ACP type modules. Daisy-
chain connections of multiple shelves is covered in the section,
“Daisy-Chaining AS2000 Shelves” .
Figure 1-5 shows how the NCM integrates TABS bus and ACP bus
modules. These are virtual buses, both having their respective
signals on the AS2000 shelf backplane.
Figure 1-5 The NCM as Gateway between the ACP and TABS Buses and Node Manager
Daisy-Chaining AS2000 Shelves
This section describes methods for connecting multiple shelves
within a node. Up to four shelves may be controlled by one NCM
card. Different cables and procedures are used according to which
type of cards are in the shelves. For a listing of which cards use the
TABS bus and which use the ACP bus see
Table 2-1 .
NOTE: The Node Address referred to in this section is not an Ethernet IP
address. Although it uses the same four octet format as an IP
address, the Node Address is used only by Verilink hardware. The
Node Address appears in the command line prompt in the Craft
interface. The Ethernet IP address is set in the Network
Configuration submenu of the Node Administration menu.
SNMP
MOM
Ethernet/SLIP
Shelf backplane
NCM
ACP
Node
ACP ACP
module module module
TABS TABS TABS
module module module
TABS bus
Manage
ACP bus
Craft
Interface
Craft
Interface