Total Access 850 System Manual
Section 2 Engineering Guidelines
64203376L1-1B
© 2004 ADTRAN, Inc.
33
DIP-Switch Settings
The Total Access 850 SDSL RCU uses DIP-switches to determine power-up start mode. Table 9 provides
details for the DIP-switches.
4.
REVIEWING THE REAR PANEL DESIGN
All connections are made through terminals, jacks, and wire-wraps on the backplane. A removable rear
cover provides access to the backplane, and an access panel that mounts to the rear cover allows access to
wire-wrap strips P1, P3, and P5, power terminal strip (P7), and clock termination switch (SW1) without
removing the main rear cover. Most CPE applications will not require removal of the rear cover.
Figure 6 shows the Total Access 850 backplane, and Table 10 on page 34 gives the backplane connections.
Figure 6. Total Access 850 Rear Panel
Table 9. SDSL RCU DIP-Switch S1 Options
Switch
Function
Description
S1-1
Firmware Mode
ON* (down)
The unit powers up in the firmware update mode.
This mode is not used for normal operation.
OFF
Disables the firmware update mode.
S1-2
Factory Defaults
ON* (down)
The unit powers up with the factory defaults
loaded.
* Denotes factory default settings.
Before removing the rear cover, do the following:
For systems using PSU (P/N 1175006L1) –
Remove the 20 Hz fuse before exposing backplane or accessing channel unit.
For systems using PSU (P/N 1175006L2) –
Depress the Ring Enable pushbutton to isolate the ring voltage from the
Total Access 850.
P7
P6
P5
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 ...
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