Access Module Interfaces; Power Supply Unit (P/N 1175006L2); Figure 8. Alternate Power Connection - ADTRAN Total Access 850 System Manual

Section 2 Engineering Guidelines
5.

ACCESS MODULE INTERFACES

Power Supply Unit (P/N 1175006L2)

The PSU receives externally supplied -48 VDC from connectors P4 (normal) and P5 (alternate) on the rear
of the unit. Connector P4 connects from an approved ADTRAN Power Supply and Battery Charger unit.
P5 is a 3-lug terminal strip that receives -48 VDC from the customer-supplied office power. Through
switchmode operation, the PSU converts the incoming -48 VDC to regulated +5 VDC, +3.3 VDC,
-7.5 VDC, -26 VDC, and -48 VDC for distribution to other modules. Ring voltage circuitry within the PSU
generates 105 Vrms, 20 Hz ring voltage for distribution to the system's FXS cards. Ring voltage is
disabled by pushing the
Faceplate LEDs
The faceplate LEDs provide status information using a color coded message format. Table 20 gives a
description of all faceplate LEDs for the Quad FXS Module when used with the Total Access 850 system.
40
16 AWG
RING LUG
RED
16 AWG
STRANDED
-48V
TO FUSE
PANEL

Figure 8. Alternate Power Connection

button.
RING ENABLE
© 2004 ADTRAN, Inc.
20 AWG
RING LUG
BLK BLK
20 AWG
SOLID
FG
GRD
TO WIRE WRAP
FRAME GROUND
Total Access 850 System Manual
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