Section 2 Engineering Guidelines
Total Access 850 System Manual
40
© 2004 ADTRAN, Inc.
64203376L1-1B
Figure 8. Alternate Power Connection
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 reg5 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
RING ENABLE
button.
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.
20 AWG
RING LUG
20 AWG
SOLID
16 AWG
STRANDED
TO FUSE
PANEL
TO WIRE WRAP
FRAME GROUND
16 AWG
RING LUG
BLK
FG
BLK
GRD
RED
-48V
Summary of Contents for Total Access 850
Page 14: ...Table of Contents Total Access 850 System Manual 14 2004 ADTRAN Inc 64203376L1 1B ...
Page 16: ...Section 1 System Description Total Access 850 System Manual 16 2004 ADTRAN Inc 64203376L1 1B ...
Page 22: ...Section 1 System Description Total Access 850 System Manual 22 2004 ADTRAN Inc 64203376L1 1B ...
Page 224: ...Section 5 DLP 4 Total Access 850 System Manual 224 2004 ADTRAN Inc 64203376L1 1B ...
Page 232: ...Section 5 DLP 6 Total Access 850 System Manual 232 2004 ADTRAN Inc 64203376L1 1B ...
Page 236: ...Section 5 DLP 7 Total Access 850 System Manual 236 2004 ADTRAN Inc 64203376L1 1B ...
Page 244: ...Section 5 DLP 10 Total Access 850 System Manual 244 2004 ADTRAN Inc 64203376L1 1B ...
Page 252: ...Section 5 DLP 13 Total Access 850 System Manual 252 2004 ADTRAN Inc 64203376L1 1B ...
Page 256: ...Section 5 DLP 14 Total Access 850 System Manual 256 2004 ADTRAN Inc 64203376L1 1B ...
Page 264: ...Section 5 DLP 16 Total Access 850 System Manual 264 2004 ADTRAN Inc 64203376L1 1B ...
Page 278: ...Section 6 ADTRAN Utilities Total Access 850 System Manual 278 2004 ADTRAN Inc 64203376L1 1B ...