Verilink XEL XSP-100 SHARK IAP (9SA-USRS-9.0R1.02) Product Manual - Manual (Page 211)

Chapter 9- Hardware Specifications
SHARK™ IAD User's Guide XEL P/N & Release: 9SA-USRS-9.0R1.02 Chapter 9-11
Figure 7: Functional diagram of the Internal Power Supply Module
IAP
Back
Plane
Power Module
Ring Generator
OUT
Return
+5VDC
-24VDC
RINGING
RGND
+
-
-48GND
AC/DC Converter
Shield or
Safety Ground
Chassis
GND
Digital
Ground
Plane
Analog
Ground
Plane
-48VDC
-48VDC
+5VDC
-24VDC
0.6 Amp
5 Amp
1 Amp