Using More than One HSS Unit
Chapter 10
FA4800 User Manual
Release 1.9.30
10-5
Figure 10-6: HSS sync signal path with ODU 1 as HSS Master
Using More than One HSS Unit
In a large collocation site, several HSS units may be cascaded (daisy-
chained) subject to the following conditions:
Condition 1: Cabling Sequence
1. Up to nine ODUs may be connected to the first HSS unit using HSS ports
SYNC 1, SYNC 2, SYNC 3,... up to SYNC 9 in order without leaving empty
ports.
2. The next available SYNC port of the first HSS unit should be
connected to SYNC 10 of the second HSS unit as shown in
Figure 10-7
. In the illustration, the next available port on the
first HSS unit is SYNC 6.
3. The second HSS unit may be filled out with up to nine more
ODUs in reverse order. That is, connect SYNC 9, SYNC 8, SYNC
7... as shown in
Figure 10-7
.
Figure 10-7: Cascading two HSS units
