Specifications

Page 27–2
FOCUS System Manual
Figure 27–1. DCU Interface Module.
RJ-48
DCU
Pin 1
Pin 8
1-RX
2-RX
7-TX
8-TX
27.3.2 Software Settings
Once you have completed the hardware installa-
tion/connections, you can configure the DCU
module using the FOCUS Configuration Software
(FCS). See figure 27-2 for a look at the configura-
tion window of the DCU module. It has the
following software selectable options.
• Switched 56kbps (DDS - primary)
• Switched 64kbps (DDS - clear chanel)
• Network or Internal Clock Source
•DCU Local Loopback
• Non-latching DSU Loopback
Fig. 27-3 shows how to map a DCU module.
27.3.3 Status Indicators
This module has nine status indicators as shown in
Figure 27-4. The red/green status LED is green if
the module is functional and red if the module is
non-functional. The RX and TX LEDs are momen-
tarily illuminated when the module is transmitting
or receiving data. If you lose a signal or Loop
Current, the top two LEDs will come on. The
remaining LEDs will illuminate when that partic-
ular function is activated.
27.4 Acceptance
Test
As noted earlier, we recommend
that you initially install and test
the DCU module and interface
in a “test” chassis (i.e., one
that is not part of an operating
network). This way, you can
quickly perform the acceptance
test without interfering with a
live network.
Please refer to fig. 27-5, to test
the data flow through the DCU
Module you will need:
•Two FOCUS chassis
•2 DCU interfaces
•Verilink router 5160
•Verilink router 5370
Figure 27–2. DCU Configuration Window.