ADCP-75-210 • Issue 1 • March 2007
Page 14
© 2007, ADC Telecommunications, Inc.
1.7.3 System Interface (STF2) Module
The System Interface (STF2) Module is a cPCI electronic module that provides the CPU and
other electronic modules with the ability to communicate with one another using the four I2C
buses on the cPCI backplane. One STF2 is used per RAN. The STF2 also has the GPS antenna
input port located in the center of the module faceplate. STF2 modules are specified according
to the number of qualifying communications devices being utilized. Table 6 describes the
module faceplate components. Figure 10 shows the location of the faceplate components.
4 RST Recessed switch Reset. Used to manually reset the CPU
5 POST Single-color LEDs
(yellow)
Post. Top four LEDs give status of CPU during initial
boot process; bottom four give board operation status
6 ENET RJ-45 connector with
single-color LEDs (green
and yellow)
Ethernet. 10 BaseT. Connects to RJ-45 connector on
SIF module (10BT port) using cable 1001478P001.
Connection status (green) and 100 BT (yellow)
7 VIDEO 15-PIN VGA connector Video. Not used by Digivance system
Table 6. System Interface Module Faceplate Components
REF # DESIGNATION DEVICE FUNCTIONAL DESCRIPTION
1 RST Recessed switch Reset. Used to halt operation of the CPU operating system. A
power ON reset is required to restart the CPU
2 STATUS 1 Single-color LED
(yellow)
Reserved for future use. Indicator turns yellow when the CPU is
not installed or has malfunctioned
3 STATUS 2 Single-color LED
(yellow)
Reserved for future use. Indicator turns yellow when the CPU is
not installed or has malfunctioned
4 STATUS GPS Single-color LED
(green)
Indicator showing that 1PPS signal is available. Led toggles once
per second (RAN only)
5 DA RJ-45 connector Door Alarm. Input using cable 1001474P001; small LED on this
connector lights (red) when door is open
6 GPS RJ-45 connector Not used
7 RECT RJ-45 connector Rectifier. Communications to rectifier using cable 1001476P001
8 (Unmarked) Single-color LED
(red)
I2C Error LEDs. One on each I2C RJ-45 connector. Indicator turns
red when there is no response on port
9 (Unmarked) Single-color LED
(green)
I2C Comm LEDs. One on each I2C RJ-45 connector. Indicator
turns green when an I2C message sent on the port
10 FLT Single-color LED
(red)
Fault. Indicator turns red when module has failed or upon startup
until the module has completed initialization
Table 5. CPU Module Faceplate Components
REF # DESIGNATION DEVICE FUNCTIONAL DESCRIPTION
