User's Manual Part 8

Host Displays Section 7
Element Management System (EMS) 4.0 User Manual
72
4.4.3 Host Window
The Host window identifies the bandwidth that the host is set to and contains two
subsets of alarms, one for the host unit optics functions and one for the host unit
synthesizer functions. The names for these alarms refer in a number of places to
“primary” and “secondary” fibers and “forward” and “reverse” paths. For
clarification (see Figure 63):
NOTE: The “host unit” in the Digivance SDR system is the Host PCIx Card
within the BTS server shown in
Figure 63.
Figure 63. Forward and Reverse Paths
(in Product Model With Secondary Fiber)
• The host unit (Host PCIx Card) will usually have two primary fibers
(connected to host Port 1 and Port 2). These fibers carry the primary
forward path (Port 1) and primary reverse path (Port 2) optical
signals. If Wave Division Multiplexers (WDMs) are used, both
signals may be transported on one fiber between multiplexers on
either end. A free space optics link may also be used.
REMOTE UNIT
19487-A
FORWARD PATH
PRIMARY
REVERSE PATH
FIBER OPTIC
LINK
SECONDARY
REVERSE PATH
(OPTIONAL)
LINUX
SERVER
APIS
BSC
NETWORK