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The primary interface for video and broadcast applications is the DVB-ASI interface 

located in the mini-I/O card slot. Alternatively this interface can be replaced with STM-1 
Optical/OC-3 or STM-1 Electrical interfaces. The optical interface is single mode at 1300 

nm. Consult factory for availability of Mini-IO STM-1/OC-3 Module. 

The I/O card has 2x100BaseTX interfaces that can be configured as either primary 

payload, or secondary wayside channels. The Over-the-air channel has a data-bandwidth 
capacity that is set by the frequency-bandwidth, modulation, and coding. The data-

bandwidth may be allocated to various I/O card interfaces, including 155.52 Mbps for 
DVB-ASI or STM-1, 2 Mbps per E1, up to 100 Mbps Ethernet, and up to 1 Mbps NMS. 
Only up to 100 Mbps of data-bandwidth may be allocated for either net data, and the two 

I/O card 100BaseTX interfaces will share that 100 Mbps data-bandwidth. 

The SDIDU™ crosspoint switch provides any-to-any E1/T1 routing between rear panel 
ports and RF links, as shown in Figure 2-12. Flexible channel mapping allows selection 

from predefined routings or custom routing. Custom routings are uploaded to the 
SDIDU™ via FTP. Two examples of the crosspoint capability are to use the crosspoint 

switch to configure a repeater or an add/drop. These examples are shown in Figure 2-13. 
In the repeater example, the Crosspoint Switch is used as a passthrough to send E1/T1s 
from the east modem to the west modem. In the add/drop example, the crosspoint 

switch connects E1/T1s from the modems to the rear-panel ports.