Installation Manual

User Reference and Installation Manual 2-13
CarrierWave Digital Radio MK-MAN-01
Figure 2-7. 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. Should one section of the ring fail, 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.
The consecutive point architecture implemented in the CarrierWave Digital Radio family is 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 CarrierWave units. These units are typically installed in
pairs in a building. Each unit installed at a customer site is logically connected to two other units.
These connections are as follows:
• An over-the-air radio frequency (RF) link to a unit at an adjacent site
• A back-to-back Ethernet cable link to another unit in the same building through a switch
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 are connected in
a ring as shown in Figure 2-8.