Verilink DIU 2130 (880-503297-001) Product Manual - Manual (Page 62)

56K NMS Option Overview
6-2 Verilink
Figure 1 Example Configuration of the 56K NMS Option managing four remote DDS circuits
The routers are each connected to the network by ConnecT 56K
DSUs. Each port of a DIU 2130/DDS supports one ConnecT 56K
DSU.
The 56 kbit/s CSU/DSU circuits are multiplexed in the central office
and passed on to the AS2000 node on a T1 or FT1 circuit. This is a
common cost-effective approach for terminating 56K circuits in a
central site.
The AM2000 accesses the DDS circuits through the Verilink Node
Controller and Channel Service Unit (NCC 2020).
Features In this section, the 56K NMS Option features are grouped as
follows:
• status codes
• alarms
• loopback codes
Status/Control
Codes
The 56K NMS Option allows the AM2000 to display the following
DDS status/control codes received by the DIU 2130/DDS:
• Abnormal Station Code (ASC)
• Control Mode Idle (CMI)
• MJU Alert (MA)
• Test Alert (TA)
• MUX-Out-Of-Sync (MOS)
• Unassigned MUX Channel (UMC)
• Test Code (TC)
• Channel loopback (CHNL)
• DSU loopback (DSU)
N
C
C
D
I
U
RS-232
T1
AS2000
Central
ConnecT
56K DS
ConnecT
56K DSU
ConnecT
56K DSU
ConnecT
56K DSU
4-WIRE DDS
4-WIRE DDS
4-WIRE DDS
4-WIRE DDS
Router
Router
D
I
U
Router
Router
Multiline shelf
AM2000
PC-compatible
Office
Router