Reviewing The Rear Panel Design; Figure 6. Total Access 850 Rear Panel; Table 9. Sdsl Rcu Dip-Switch S1 Options - ADTRAN Total Access 850 System Manual

Total Access 850 System Manual
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.
Switch Function
S1-1 Firmware Mode
S1-2 Factory Defaults
* Denotes factory default settings.
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.
Before removing the rear cover, do the following:
Figure 6 shows the Total Access 850 backplane, and Table 10 on page 34 gives the backplane connections.
64203376L1-1B

Table 9. SDSL RCU DIP-Switch S1 Options

Description
ON* (down) The unit powers up in the firmware update mode.
OFF
ON* (down) The unit powers up with the factory defaults
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.

Figure 6. Total Access 850 Rear Panel

© 2004 ADTRAN, Inc.
Section 2 Engineering Guidelines
This mode is not used for normal operation.
Disables the firmware update mode.
loaded.
P7
P6
33