Specifications

SPS-6, SPS-12 Controls, Indicators and Connectors 3-1
Chapter 3
Operation
3.1 General
SPS-6, SPS-12 supports a wide range of applications, such as:
• Backbone for a low-cost private synchronous network with optional
connection to the public network
• Expansion of the number of asynchronous channels, using RAD STM statistical
multiplexers (proprietary)
• Public Network access via redundant links
• Running asynchronous data in X.25 packets over Frame Relay
• Running asynchronous data directly over Frame Relay (e.g., SLIP protocol over
Frame Relay)
• Routing between several Frame Relay devices or networks (Frame Relay to
Frame Relay switching)
• Connection of devices supporting HDLC protocol to the X.25 or Frame Relay
network.
For more detailed configuration information, refer to the RAD Packet Switching
Guide and RAD Packet Switching Applications Guide.
3.2 Controls, Indicators and Connectors
Front Panel Controls, Indicators and Connectors
Table 3-1 lists the functions of the SPS-12 front panel indicators and connectors.
The numbers under the heading “Item” refer to the identification numbers in
Figure 3-1. The SPS-6 front panel is similar to the SPS-12 but has 6 main links
activity and sync indicators.
Figure 3-1. SPS-12 Front Panel Controls, Indicators and Connectors