Справочник Пользователя для Moseley Associates Inc EVENTHD
20
2. System Description
© 2007 Moseley, Inc. All Rights Reserved.
602-14886-01, Rev. A
Figure 2-6. Ring Configuration
SONET/SDH rings are inherently self-healing. Each ring has both an active path and a
standby path. Network traffic normally uses the active path. If one section of the ring
standby path. Network traffic normally uses the active path. If one section of the ring
fails, the network will switch to the standby path. Switchover occurs in seconds. There
may be a brief delay in service, but no loss of payload, thus maintaining high levels of
network availability.
may be a brief delay in service, but no loss of payload, thus maintaining high levels of
network availability.
The consecutive point architecture implemented in the Moseley Digital Radio family is
based on a point-to-point-to-point topology that mimics fiber rings, with broadband
based on a point-to-point-to-point topology that mimics fiber rings, with broadband
wireless links replacing in-ground fiber cable. A typical consecutive point network consists
of a POP and several customer sites connected using Software Defined IDU™. These
of a POP and several customer sites connected using Software Defined IDU™. These
units are typically in a building in an east/west configuration. Using east/west
configurations, each unit installed at a customer site is logically connected to two other
configurations, each unit installed at a customer site is logically connected to two other
units via an over-the-air radio frequency (RF) link to a unit at an adjacent site.
Each consecutive point network typically starts and ends at a POP. A pattern of wireless
links and in-building connections is repeated at each site until all buildings in the network
links and in-building connections is repeated at each site until all buildings in the network
are connected in a ring as shown for an ethernet network in Figure 2-7. For 2 x 1+0 and
2 x 1+1 nodes payload and NMS connections need to be jumpered between two
2 x 1+1 nodes payload and NMS connections need to be jumpered between two
SDIDU
TM
. For 1 x 2+0 nodes, there is no need for jumpers as there is a single SDIDU
TM
.
For SDH or SONET payloads, the configuration is similar but an external add/drop mux is
required.