Red
MAX
™
Subscriber Modem
SU-O User Manual
70-00057-01-01-DRAFT
Proprietary Redline Communications © 2007
September
7,
2007
Page 16 of 55
2.1.6 Reed Solomon Error Correction
Outer Reed-Solomon and inward Convolution Coding (RS-CC) error correction is
enabled for all traffic rates, with the exception of BPSK 1/2 where only inward
Convolution Coding is used. These low-level processes can correct bursts of errors in
received messages and reduce the number of retransmissions.
2.2 Deployment
Models
The subscriber supports point to point (PTP) and point to multipoint (PMP) deployment
scenarios.
2.2.1 PTP
Deployment
When deployed in a PTP configuration the base station establishes a dedicated bi-
directional link to a single subscriber. The PTP deployments typically use a directional
narrow beam antenna for both ends of the link.
Figure 3: System - PTP Line of Sight Deployment
2.2.2 PMP
Deployment
When deployed in a PMP configuration the base station establishes bi-directional links to
more than one subscriber. The PMP deployments typically use a wide beam (sector)
antenna at the base station and a narrow beam antenna at the subscriber. Service flows are
used to police service level agreements for each subscriber.
2.2.3 Non
Line-of-Sight
The subscriber system supports line-of-sight (LOS), optical line-of-sight (OLOS), and
non line-of-sight (NLOS) operation. A clear LOS link has no obstacles within 60% of the
first Fresnel zone of the direct path. An OLOS link has obstructions within 60% of the
first Fresnel zone, but a visible path exists from the base station to the subscriber.