Verilink AS2000: The Basics (880-502981-001) Product Manual - Manual (Page 25)

System Information
Verilink Access System 2000: The Basics 2-9
ACP-Based
Application
Modules
ACP-based modules provide increased functionality over TABS-
based modules. ACP-based modules can operate independently, as
shelf controllers, or controlled by an NCM. The following ACP-
based application modules are used in the AS2000 system:
Table 2-4 ACP Application Modules
Node Controller
Module
The Node Control Module (NCM) communicates in both the ACP and
TABS protocol. The NCM works with all AS2000 products (except
TIU 2850 or the DIU 2140), and includes an embedded SNMP
management agent. The NCM is not an application module, but a
dedicated controller module.
The NCM integrates TABS and ACP-based modules into the same
shelf unit. The NCM can manage up to 51 application modules in a
node. This is the only AS2000 controller used in the E1 and high
bandwidth environment.
SCC 2020 This unit is an SNMP controller with a management interface
that includes a T1 CSU. This unit can manage up to 52
modules in a single node (CSU, D&I, MUX).
SCC 2130 This SNMP controller includes an integrated T1 CSU/DSU and
can manage up to 52 modules in a node (MUX).
SCC 2120 This SNMP controller includes an advanced protection switch,
providing manual or automatic 1-for-n T1 line protection.
This unit can manage up to 52 modules in a node (CSU).
Module Function
DCSU 2911 A dual-port CSU with two complete T1 or E1 CSUs. (CSU)
DIDCSU 2912 Dual Integrated DSU/CSU with two data ports and two
network ports. Circuits are used to direct links between
the four ports. Used with the NCM, circuits can be built
between modules. (CSU, D&I, MUX)
DPRI 2922 The Dual Primary Rate Interface (ISDN) provides a T1 dial-
backup system for the network. It has the same circuit-
build features and modes as the DIDCSU 2912.
QUAD/IMUX An inverse multiplexing system with automatic rate
adaption for up to eight T1/E1 lines. Consists of one
IMUX 2160 module and one or two QUAD 2164 modules.
SNMP over 10BaseT is supported by the QUAD 2164
HDM 2180 A high speed digital interface module, converts very high
bandwidth data into DS3 framing format. The 2180 has a
single data port.
HDM 2182 The HDM 2182 multiplexes two high-bandwidth data
applications into the DS3 framing format.
QPRI 2921 CSU module with two PRI ISDN ports and 2 T1 ports. The
QPRI provides an alternate ISDN route when regular T1
lines are unavailable. The QPRI 2921 can also be used to
designate a reserve leased T1 as a backup.