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System Cards 7-47
CPU Card IP Packet Routing
7.5.1 nX64 Screen
The Enhanced NMS Connectivity screen (Figure 7-23) provides a solution to increase
bandwidth channel for management purposes. FDL was previously the answer to this need for
not consuming valuable bandwidth. However, by giving up a time slot the increase of
bandwidth provided better connectivity allowing a variable bandwidth from 56 Kbps to 1.54
Mbps for T1 and 2 Mbps for E1. A single 1x64 Kbps channel improves the bandwidth over
FDL 16 times.
Figure 7-23.nX64 Main Screen
The 7.x CPU includes four controllers for use in various types of communication. All four
controllers are mapped through two TSA (Time Slot Assigner) devices and will share a
common pool of 64 time slots. The TSAs are cross-connected to the TDM (Time Division
Multiplexing) bus via MTUSs (Memory Time Switches).
Currently, the four nx64 ports can only be assigned to WAN resources.
The four available channels may be configured at nx64 kpbs, using plain HDLC for
communication with other Integrated Access Systems, or using RFC1490 encapsulation for
connectivity to other Integrated Access Systems as well as the Frame Relay public network.
Table 7-15. nX64 Screen Actions
Action Function
Save Saves changes to settings.
Undo Returns all settings to the last saved state.
Refresh Used on Testing and Monitoring screens to update statistics, and on other
screens to redraw the screen.
Copy Copies settings to next available slot
Netstat Displays the Network Statistics Screen. See below.